def calcDepAdjustment(corp):
"""
Calculates the adjustment factor for assets, depreciation and investment
corp: indicator for whether corporate or noncorporate data
"""
# Create Asset object
policy = Policy()
asset1 = Asset(policy.parameters_dataframe(), corp)
asset1.calc_all()
# Get unscaled depreciation for all years
totalAnnualDepreciation = asset1.calcDep_allyears()
# Get IRS data
depreciation_data = copy.deepcopy(asset1.data.depreciationIRS_data)
depreciation_data['dep_model'] = totalAnnualDepreciation[40:54]
if corp:
depreciation_data['scale'] = (depreciation_data['dep_Ccorp'] /
depreciation_data['dep_model'])
else:
depreciation_data['scale'] = (
(depreciation_data['dep_Scorp'] + depreciation_data['dep_sp'] +
depreciation_data['dep_partner']) /
depreciation_data['dep_model'])
adj_factor = (sum(depreciation_data['scale']) /
len(depreciation_data['scale']))
# depreciation_data.to_csv('depr_data_' + str(corp) + '.csv')
return adj_factor
def calcIDAdjustment(corp, eta=0.4):
"""
Calculates the adjustment factors for the corporate and noncorporate
debt and interest.
eta: retirement rate of existing debt
"""
policy = Policy()
policy_params_df = policy.parameters_dataframe()
# Create Asset object
asset = Asset(policy_params_df, corp)
asset.calc_all()
# Get asset forecast
forecast = asset.get_forecast()
# Create Debt object
debt = Debt(policy_params_df, forecast, corp=corp)
debt.calc_all()
# Get unscaled net interest deduction
NID_gross = debt.NID[38:54]
# Get net interest deduction from historical IRS data
if corp:
NID_irs = np.array(data1.debt_data_corp['NID_IRS'])[38:54]
else:
NID_irs = np.array(data1.debt_data_noncorp['ID_Scorp'][38:54] +
data1.debt_data_noncorp['ID_sp'][38:54] +
data1.debt_data_noncorp['ID_partner'][38:54])
NID_scale = sum(NID_irs / NID_gross) / 16.0 # 16 = 54 - 38
return NID_scale
def __init__(self, btax_params, earnings,
data=None, assets=None, debts=None):
# Create an associated Data object
if isinstance(data, Data):
self.data = data
else:
self.data = Data()
if isinstance(btax_params, pd.DataFrame):
self.btax_params = btax_params
else:
raise ValueError('btax_params must be DataFrame')
if assets is not None:
if isinstance(assets, Asset):
self.assets = assets
else:
raise ValueError('assets must be Asset object')
else:
self.assets = Asset(btax_params)
self.assets.calc_all()
if debts is not None:
if isinstance(debts, Debt):
self.debts = debts
else:
raise ValueError('debts must be Debt object')
else:
assets_forecast = self.assets.get_forecast()
self.debts = Debt(btax_params, assets_forecast)
self.debts.calc_all()
# Use earnings to create DataFrame for results
assert len(earnings) == 14
combined = pd.DataFrame({'year': range(2014,2028), 'ebitda': earnings})
# Add tax depreciation and net interest deductions
combined['taxDep'] = self.assets.get_taxdep()
combined['nid'] = self.debts.get_nid()
self.combined_return = combined
def __init__(self, btax_params):
# Store policy parameter objects
if isinstance(btax_params, pd.DataFrame):
self.btax_params = btax_params
else:
raise ValueError('btax_params must be DataFrame')
# Create Data object
self.data = Data()
# Create Asset object and calculate
self.asset = Asset(self.btax_params, corp=False, data=self.data)
self.asset.calc_all()
# Create earnings forecast
self.create_earnings()
def calcIDAdjustment(corp, eta=0.4):
"""
Calculates the adjustment factors for the corporate and noncorporate
debt and interest.
eta: retirement rate of existing debt
"""
data = Data()
policy = Policy()
policy_params_df = policy.parameters_dataframe()
# Create Asset object
asset = Asset(policy_params_df, corp)
asset.calc_all()
# Get asset forecast
forecast = asset.get_forecast()
# Create Debt object
debt = Debt(policy_params_df, forecast, corp=corp)
debt.calc_all()
# Get unscaled interest incomes and expenses
intpaid_model = debt.int_expense[40:54]
intinc_model = debt.int_income[40:54]
muniinc_model = debt.muni_income[40:54]
if corp:
# Exclude anomalous results for 2007
paid_scale = (sum(intpaid[:7] / intpaid_model[:7]) +
sum(intpaid[8:] / intpaid_model[8:])) / 13.
inc_scale = (sum(taxint[:7] / intinc_model[:7]) +
sum(taxint[8:] / intinc_model[8:])) / 13.
muni_scale = (sum(ntaxint[:7] / muniinc_model[:7]) +
sum(ntaxint[8:] / muniinc_model[8:]))/ 13.
scales = [paid_scale, inc_scale, muni_scale]
else:
ID_irs = np.array(data.debt_data_noncorp['ID_Scorp'][40:54] +
data.debt_data_noncorp['ID_sp'][40:54] +
data.debt_data_noncorp['ID_partner'][40:54])
scales = sum(ID_irs / intpaid_model) / 14.
assets14 = forecast[0]
return (scales, assets14, intpaid_model, intinc_model, muniinc_model)
class BtaxMini():
"""
Constructor for the BtaxMini class. This class functions similarly to
the B-Tax model, with several modifications, such as the use of different
equations and allowing for nonconstant tax rates, as well as producing
somewhat different final measures.
Parameters
----------
btax_params: DataFrame of regular tax parameters
Returns
-------
DataFrame of user cost of capital and EATR for each year and asset type
"""
def __init__(self, btax_params):
self.econ_params = copy.deepcopy(Data().econ_defaults)
self.btax_params = btax_params
self.asset_c = Asset(btax_params, corp=True)
self.asset_c.build_deprLaw_matrices()
def make_tdict_c(self, start_year):
"""
Produces a dictionary of tax rates and changes to those rates,
for use when calculating rho and EATR, for corporations.
Assumes no changes after 2027.
"""
assert start_year >= 2017
assert type(start_year) == int
if start_year >= 2027:
tdict = {'0': self.btax_params['tau_c'][10]}
else:
tdict = {'0': self.btax_params['tau_c'][start_year - 2014]}
for i in range(start_year - 2016,
len(self.btax_params['year']) - 3):
if self.btax_params['tau_c'][
i + 3] != self.btax_params['tau_c'][i + 2]:
tdict[str(i - (start_year -
2017))] = self.btax_params['tau_c'][i + 3]
return tdict
def make_tdict_nc(self, start_year):
"""
Produces a dictionary of tax rates and changes to those rates,
for use when calculating rho and EATR, for noncorporate businesses.
Assumes no changes after 2027.
"""
assert start_year >= 2017
assert type(start_year) == int
if start_year >= 2027:
tdict = {'0': self.btax_params['tau_nc'][13]}
else:
tdict = {'0': self.btax_params['tau_nc'][start_year - 2014]}
for i in range(start_year - 2016,
len(self.btax_params['year']) - 3):
tdict[str(i - (start_year -
2017))] = self.btax_params['tau_nc'][i + 3]
return tdict
def get_econ_params_oneyear(self, year):
"""
Extracts the economic parameters to use for calculations in each year.
"""
r_d = self.econ_params['r_d'][year - 2014]
r_e_c = self.econ_params['r_e_c'][year - 2014]
r_e_nc = self.econ_params['r_e_nc'][year - 2014]
pi = self.econ_params['pi'][year - 2014]
f_c = self.econ_params['f_c'][year - 2014]
f_nc = self.econ_params['f_nc'][year - 2014]
r_c = f_c * r_d + (1 - f_c) * r_e_c
r_nc = f_nc * r_d + (1 - f_nc) * r_e_nc
return (r_c, r_nc, r_d, pi, f_c, f_nc)
def calc_frac_ded(self, year):
"""
Calculates the fraction of interest deductible for the given year,
for corporate and noncorporate.
"""
# Extract the corporate interest haircuts
hc_nid_c = np.array(self.btax_params['netIntPaid_corp_hc'])[year -
2014]
hc_id_new_year_c = np.array(
self.btax_params['newIntPaid_corp_hcyear'])[year - 2014]
hc_id_new_c = np.array(self.btax_params['newIntPaid_corp_hc'])[year -
2014]
# Find haircut for corporations
fracdedc = 1.0 - hc_nid_c
if year >= hc_id_new_year_c:
fracdedc = min(fracdedc, 1.0 - hc_id_new_c)
hc_id_new_year_nc = np.array(
self.btax_params['newIntPaid_noncorp_hcyear'])[year - 2014]
hc_id_new_nc = np.array(
self.btax_params['newIntPaid_noncorp_hc'])[year - 2014]
# Find haircut for noncorporate businesses
if year < hc_id_new_year_nc:
# If not subject to haircut
fracdedn = 1.0
else:
# If subject to haircut
fracdedn = 1.0 - hc_id_new_nc
return (fracdedc, fracdedn)
def calc_I(self, delta, r, a, b):
"""
Calculates present value of income occuring during the period [a,b]
delta: depreciation rate
r: discount rate
Note: this is based on unit incone amount
"""
if r + delta == 0:
I = b - a
else:
I = (1 / (r + delta) * np.exp(-(r + delta) * a) *
(1 - np.exp(-(r + delta) * (b - a))))
return I
def calc_Ilist(self, delta, r, length=50):
"""
Calculates present value of income unit over lifetime
delta: depreciation rate
r: discount rate
length: number of periods to use
"""
# Calculate for first (half) year
I0 = self.calc_I(delta, r, 0, 0.5)
Ilist = [I0]
for j in range(1, length - 1):
Ilist.append(self.calc_I(delta, r, j - 0.5, j + 0.5))
# Calculate from final period to infinity
Ilist.append(self.calc_I(delta, r, length - 1 - 0.5, 9e99))
return Ilist
def calc_F(self, f, r, i, delta, fracded, a, b):
"""
Calculates present value of interest deduction during period [a,b]
f: ratio of debt to assets
r: discount rate
i: interest rate on debt
delta: depreciation rate
fracded: fraction of interest paid deductible
"""
F = (f * i / (r + delta) * fracded * np.exp(-(r + delta) * a) *
(1 - np.exp(-(r + delta) * (b - a))))
return F
def calc_Flist(self, f, r, i, delta, fracded, length=50):
"""
Calculates present value of interest deduction over lifetime
f: ratio of debt to assets
r: discount rate
i: interest rate on debt
delta: depreciation rate
fracded: fraction of interest paid deductible
length: number of periods to use
"""
# Calcuate for first (half) year
Flist = [self.calc_F(f, r, i, delta, fracded, 0, 0.5)]
for j in range(1, length - 1):
Flist.append(self.calc_F(f, r, i, delta, fracded, j - 0.5,
j + 0.5))
# Calculate from final period to infinity
Flist.append(
self.calc_F(f, r, i, delta, fracded, length - 1 - 0.5, 9e99))
return Flist
def calc_Dlist_exp(self, length=50):
"""
Calculates depreciation deduction vector for expensing
Note: by default, this is 1 for the first period and 0 thereafter
"""
Dlist = np.zeros(length)
Dlist[0] = 1
return Dlist
def calc_D_econ(self, delta, r, a, b):
"""
Calculates PV of depreciation deduction during [a,b] using economic
depreciation method.
delta: depreciation rate
r: discount rate
"""
if r + delta == 0:
D = delta * (b - a)
else:
D = (delta / (r + delta) * np.exp(-(r + delta) * a) *
(1 - np.exp(-(r + delta) * (b - a))))
return D
def calc_Dlist_econ(self, delta, r, bonus, length=50):
"""
Calculates present value of depreciation deductions over lifetime
for economic depreciation.
delta: depreciation rate
r: discount rate
bonus: bonus depreciation rate
"""
# Calculate for fist (half) year
Dlist = [bonus + (1 - bonus) * self.calc_D_econ(delta, r, 0, 0.5)]
for j in range(1, length - 1):
Dlist.append(
(1 - bonus) * self.calc_D_econ(delta, r, j - 0.5, j + 0.5))
# Calculate from last period to infinity
Dlist.append(
(1 - bonus) * self.calc_D_econ(delta, r, length - 1 - 0.5, 9e99))
return Dlist
def calc_D_dbsl(self, N, L, r, pi, a, b):
"""
Calculates PV of depreciation deductions during [a,b] for declining
balance and straight-line depreciation.
N: exponential depreciation:
2 for double-declining balance
1.5 for 150% declining balance
1 for straight-line
L: tax life
r: discount rate
pi: inflation rate
"""
# Ensure N is not an int
N = N * 1.0
# Switching point
t1 = L * (1 - 1 / N)
# End of tax life
t2 = L
if b <= t1:
# If entirely subject to exponential depreciation
D = (N / L / (r + pi + N / L) * np.exp(-(r + pi + N / L) * a) *
(1 - np.exp(-(r + pi + N / L) * (b - a))))
elif b <= t2:
if a < t1:
# If period splits exponential and straight-line depreciation
Ddb = (N / L / (r + pi + N / L) *
np.exp(-(r + pi + N / L) * a) *
(1 - np.exp(-(r + pi + N / L) * (t1 - a))))
if r + pi == 0:
# Special case of zero nominal discount rate
Dsl = np.exp(1 - N) * (b - t1) / (t2 - t1)
else:
Dsl = (N / L / (r + pi) * np.exp(1 - N) *
np.exp(-(r + pi) * t1) * (1 - np.exp(-(r + pi) *
(b - t1))))
D = Ddb + Dsl
else:
# If entirely subject to straight-line depreciation
if r + pi == 0:
D = np.exp(1 - N) * (b - a) / (t2 - t1)
else:
D = (N / L / (r + pi) * np.exp(1 - N) *
np.exp(-(r + pi) * a) * (1 - np.exp(-(r + pi) *
(b - a))))
else:
# end of period occurs after tax life ends
if a < t2:
# If tax life ends during period
if r + pi == 0:
D = np.exp(1 - N) * (t2 - a) / (t2 - t1)
else:
D = (N / L / (r + pi) * np.exp(1 - N) *
np.exp(-(r + pi) * a) * (1 - np.exp(-(r + pi) *
(t2 - a))))
else:
# If period occurs entirely after tax life has ended
D = 0
return D
def calc_Dlist_dbsl(self, N, L, bonus, r, pi, length=50):
"""
Calculates present value of depreciation deductions over lifetime
for declining balance and straight-line depreciation.
N: exponential depreciation:
2 for double-declining balance
1.5 for 150% declining balance
1 for straight-line
L: tax life
r: discount rate
pi: inflation rate
length: number of periods to use
"""
Dlist = [bonus + (1 - bonus) * self.calc_D_dbsl(N, L, r, pi, 0, 0.5)]
for j in range(1, length):
Dlist.append(
(1 - bonus) * self.calc_D_dbsl(N, L, r, pi, j - 0.5, j + 0.5))
return Dlist
def calc_Dlist(self, method, life, delta, r, pi, bonus, length=50):
"""
Calculates present value of depreciation deductions over lifetime.
method: depreciation method to use
life: tax life
delta: depreciation rate
r: discount rate
pi: inflation rate
bonus: bonus depreciation rate
length: number of periods to use
"""
# Check that methods are acceptable
assert method in [
'DB 200%', 'DB 150%', 'SL', 'Economic', 'Expensing', 'None'
]
# Check bonus depreciation rates
assert bonus >= 0 and bonus <= 1
if type(length) != int:
length = int(length)
if method == 'DB 200%':
# Double-declining (200%) balance depreciation
Dlist = self.calc_Dlist_dbsl(2, life, bonus, r, pi, length)
elif method == 'DB 150%':
# 150% declining balance depreciation
Dlist = self.calc_Dlist_dbsl(1.5, life, bonus, r, pi, length)
elif method == 'SL':
# Straight-line depreciation
Dlist = self.calc_Dlist_dbsl(1.0, life, bonus, r, pi, length)
elif method == 'Economic':
# Economic depreciation
Dlist = self.calc_Dlist_econ(delta, r, bonus, length)
elif method == 'Expensing':
# Expensing
Dlist = self.calc_Dlist_exp(length)
else:
# No depreciation
Dlist = np.zeros(length)
return Dlist
def calc_Tlist(self, tdict, length=50):
"""
Builds list of statutory tax rates for each period in lifetime
tdict: dictionary of tax rates and when they become effective
tdict may not be empty
tdict must contain at least one key of '0'
tdict keys must be as nonnegative integers
length: number of periods to use
"""
assert len(tdict) > 0
# changelist is the period when the tax rate changes
changelist = []
for key in tdict:
changelist.append(int(key))
changelist.sort()
# ratelist is list of tax rates
ratelist = []
for chg in changelist:
ratelist.append(tdict[str(chg)])
numrates = len(ratelist)
rateind = 0
# Get initial tax rate
Tlist = [tdict[str(changelist[0])]]
for j in range(1, length):
if rateind + 1 == numrates:
# If at end of tax rate changes
Tlist.append(ratelist[rateind])
else:
if j < changelist[rateind + 1]:
# If between tax rate changes
Tlist.append(ratelist[rateind])
else:
# If tax rate change occurs this year
rateind = rateind + 1
Tlist.append(ratelist[rateind])
return Tlist
def calc_rho(self,
r,
pi,
delta,
method,
life,
bonus,
f,
rd,
fracded,
tdict,
length=50):
"""
Calculates the cost of capital
r: discount rate
pi: inflation rate
delta: depreciation rate
method: depreciation method
life: tax life
bonus: bonus depreciation rate
f: debt to asset ratio
rd: interest rate on debt
fracded: fraction of interest paid deductible
tdict: dict of tax rates and changes
length: number of periods to use
"""
# Get tax rates for all periods
Tlist = np.asarray(self.calc_Tlist(tdict, length))
# Get income rates for all periods
Nlist = np.asarray(self.calc_Ilist(delta, r, length))
# Get depreciation deductions for all periods
Dlist = np.asarray(
self.calc_Dlist(method, life, delta, r, pi, bonus, length))
# Get interest deductions for all periods
Flist = np.asarray(self.calc_Flist(f, r, rd, delta, fracded, length))
# Present value of tax shield from depreciation
A = sum(Dlist * Tlist)
# Present value of tax shield from interest deduction
F = sum(Flist * Tlist)
# Present value of gross income net-of-tax rate
N = sum(Nlist * (1 - Tlist))
rho = (1 - A - F) / N - delta
return rho
def calc_rho_inv(self, r, pi, inv_method, hold, tdict):
"""
Calculates the cost of capital for inventories
r: discount rate
pi: inflation rate
inv_method: inventory accounting method
hold: holding period for inventories
tdict: dict of tax rates and changes
"""
# Acceptable inventory methods
assert inv_method in ['FIFO', 'LIFO', 'Expensing', 'Mix']
tau = tdict['0']
# Cost of capital with expensing
rho_exp = r
# Cost of capital using LIFO
rho_lifo = (1 / hold * np.log((np.exp(
(r + pi) * hold) - tau) / (1 - tau)) - pi)
# Cost of capital using FIFO
rho_fifo = 1 / hold * np.log((np.exp(r * hold) - tau) / (1 - tau))
if inv_method == 'FIFO':
rho_inv = rho_fifo
elif inv_method == 'LIFO':
rho_inv = rho_lifo
elif inv_method == 'Expensing':
rho_inv = rho_exp
else:
# Mix of 50% FIFO and 50% LIFO
rho_inv = 0.5 * (rho_fifo + rho_lifo)
return rho_inv
def calc_eatr(self,
p,
r,
pi,
delta,
method,
life,
bonus,
f,
rd,
fracded,
tdict,
length=50):
"""
Calculates the effective average tax rate on investment
p: financial income rate
r: discount rate
pi: inflation rate
delta: depreciation rate
method: depreciation method
life: tax life
bonus: bonus depreciation rate
f: debt to asset ratio
rd: interest rate on debt
fracded: fraction of interest paid deductible
tdict: dict of tax rates and changes
length: number of periods to use
"""
# Calculate the cost of capital
coc = self.calc_rho(r, pi, delta, method, life, bonus, f, rd, fracded,
tdict, length)
# Check that the financial income rate exceess the cost of capital
assert p >= coc
# Rent in the absence of tax
Rstar = (p - r) / (r + delta)
# Income stream
P = p / (r + delta)
Tlist = np.asarray(self.calc_Tlist(tdict, length))
Nlist = np.asarray(self.calc_Ilist(delta, r, length))
Dlist = np.asarray(
self.calc_Dlist(method, life, delta, r, pi, bonus, length))
Flist = np.asarray(self.calc_Flist(f, r, rd, delta, fracded, length))
A = sum(Dlist * Tlist)
F = sum(Flist * Tlist)
N = sum(Nlist * (1 - Tlist))
# Calculate after-tax rent
R = -(1 - A - F) + (p + delta) * N
eatr = (Rstar - R) / P
return eatr
def calc_usercost(self,
r,
pi,
delta,
method,
life,
bonus,
f,
rd,
fracded,
tdict,
length=50):
"""
Calculates the cost of capital
r: discount rate
pi: inflation rate
delta: depreciation rate
method: depreciation method
life: tax life
bonus: bonus depreciation rate
f: debt to asset ratio
rd: interest rate on debt
fracded: fraction of interest paid deductible
tdict: dict of tax rates and changes
length: number of periods to use
"""
# Calculate the cost of capital
coc = self.calc_rho(r, pi, delta, method, life, bonus, f, rd, fracded,
tdict, length)
ucoc = coc + delta
return ucoc
def calc_oneyear(self, year):
"""
In the given year, calculates EATR and user cost of capital for each
asset type.
"""
# Check that year has acceptable value
assert year in range(2017, 2028)
# Extract economic parameters
[r_c, r_nc, r_d, pi, f_c, f_nc] = self.get_econ_params_oneyear(year)
# Extract tax depreciation information
Method = self.asset_c.method_history[year - 1960]
Life = self.asset_c.life_history[:, year - 1960]
Bonus = self.asset_c.bonus_history[:, year - 1960]
# Make tax rate dictionaries
tdict_c = self.make_tdict_c(year)
tdict_nc = self.make_tdict_nc(year)
# Create base DataFrame and get depreciation rates
asset_data = copy.deepcopy(Data().assets_data())
Delta = np.array(Data().econ_depr_df()['delta'])
# Get deductible fractions of interest paid
(fracded_c, fracded_nc) = self.calc_frac_ded(year)
# Get inventory method
inv_method = self.btax_params['inventory_method'][year - 2014]
assets = np.asarray(asset_data['Asset'])
uc_c = np.zeros(len(assets))
uc_nc = np.zeros(len(assets))
eatr_c = np.zeros(len(assets))
eatr_nc = np.zeros(len(assets))
for j in range(len(asset_data)):
uc_c[j] = self.calc_usercost(r_c, pi, Delta[j], Method[j], Life[j],
Bonus[j], f_c, r_d, fracded_c,
tdict_c, 50)
uc_nc[j] = self.calc_usercost(r_nc, pi, Delta[j], Method[j],
Life[j], Bonus[j], f_nc, r_d,
fracded_nc, tdict_nc, 50)
eatr_c[j] = self.calc_eatr(0.2,
r_c,
pi,
Delta[j],
Method[j],
Life[j],
Bonus[j],
f_c,
r_d,
fracded_c,
tdict_c,
length=50)
eatr_nc[j] = self.calc_eatr(0.2,
r_nc,
pi,
Delta[j],
Method[j],
Life[j],
Bonus[j],
f_nc,
r_d,
fracded_nc,
tdict_nc,
length=50)
# Special cost of capital calculations for inventories
uc_c[assets == 'Inventories'] = self.calc_rho_inv(
r_c, pi, inv_method, 0.5, tdict_c)
uc_nc[assets == 'Inventories'] = self.calc_rho_inv(
r_nc, pi, inv_method, 0.5, tdict_nc)
# EATR for inventories and land with no supernormal returns
eatr_c[assets == 'Inventories'] = (uc_c[assets == 'Inventories'] -
r_c) / uc_c[assets == 'Inventories']
eatr_nc[assets ==
'Inventories'] = (uc_nc[assets == 'Inventories'] -
r_nc) / uc_nc[assets == 'Inventories']
eatr_c[assets == 'Land'] = (uc_c[assets == 'Land'] -
r_c) / uc_c[assets == 'Land']
eatr_nc[assets == 'Land'] = (uc_nc[assets == 'Land'] -
r_nc) / uc_nc[assets == 'Land']
# Save the results to the main DataFrame
asset_data['uc_c'] = uc_c
asset_data['uc_nc'] = uc_nc
asset_data['eatr_c'] = eatr_c
asset_data['eatr_nc'] = eatr_nc
asset_data.drop(['assets_c', 'assets_nc'], axis=1, inplace=True)
return asset_data
def run_btax_mini(self, yearlist):
"""
Runs the code to compute the user cost and EATR
for each asset type for each year in yearlist.
"""
basedata = copy.deepcopy(Data().assets_data())
for year in yearlist:
# Get calculations for each year
results_oneyear = self.calc_oneyear(year)
# Rename to include the year calculated
results_oneyear.rename(columns={
'uc_c': 'u_c' + str(year),
'uc_nc': 'u_nc' + str(year),
'eatr_c': 'eatr_c' + str(year),
'eatr_nc': 'eatr_nc' + str(year)
},
inplace=True)
# Merge year's results into combined DataFrame
basedata = basedata.merge(right=results_oneyear,
how='outer',
on='Asset')
basedata.drop(['assets_c', 'assets_nc'], axis=1, inplace=True)
return basedata
def __init__(self, btax_params):
self.econ_params = copy.deepcopy(Data().econ_defaults)
self.btax_params = btax_params
self.asset_c = Asset(btax_params, corp=True)
self.asset_c.build_deprLaw_matrices()
class CorpTaxReturn():
"""
Constructor for the CorpTaxReturn object.
This class includes objects relevant to the calculation of
corporate income tax liability:
assets: an associated Asset object
debts: an associated debt object
combined_return: a DataFrame with tax calculations for each year
Parameters:
btax_params: dict of business tax policy parameters
assets: Asset object for the corporation
debts: Debt object for the corporation
earnings: list or array of earnings for each year in the budget window
"""
def __init__(self, btax_params, earnings,
data=None, assets=None, debts=None):
# Create an associated Data object
if isinstance(data, Data):
self.data = data
else:
self.data = Data()
if isinstance(btax_params, pd.DataFrame):
self.btax_params = btax_params
else:
raise ValueError('btax_params must be DataFrame')
if assets is not None:
if isinstance(assets, Asset):
self.assets = assets
else:
raise ValueError('assets must be Asset object')
else:
self.assets = Asset(btax_params)
self.assets.calc_all()
if debts is not None:
if isinstance(debts, Debt):
self.debts = debts
else:
raise ValueError('debts must be Debt object')
else:
assets_forecast = self.assets.get_forecast()
self.debts = Debt(btax_params, assets_forecast)
self.debts.calc_all()
# Use earnings to create DataFrame for results
assert len(earnings) == 14
combined = pd.DataFrame({'year': range(2014,2028), 'ebitda': earnings})
# Add tax depreciation and net interest deductions
combined['taxDep'] = self.assets.get_taxdep()
combined['nid'] = self.debts.get_nid()
self.combined_return = combined
def update_assets(self, assets):
"""
Updates the Asset object associated with the tax return.
"""
if isinstance(assets, Asset):
self.assets = assets
else:
raise ValueError('assets must be Asset object')
def update_debts(self, debts):
"""
Updates the Debt object associated with the tax return.
"""
if isinstance(debts, Debt):
self.debts = debts
else:
raise ValueError('debts must be Debt object')
def update_earnings(self, earnings):
"""
Updates the earnings DataFrame associated with the tax return.
"""
assert len(earnings) == 14
self.combined_return['ebitda'] = earnings
def calcSec199(self):
"""
Calculates section 199 deduction.
"""
# Extract relevant parmeters
s199_hclist = np.array(self.btax_params['sec199_hc'])
profit = np.asarray(self.data.gfactors['profit_d'])
sec199_res = np.zeros(14)
sec199_2013 = np.asarray(self.data.historical_taxdata['sec199'])[-1]
for i in range(14):
sec199_res[i] = profit[i+1] / profit[0] * sec199_2013 * (1 - s199_hclist[i])
self.combined_return['sec199'] = sec199_res
def calcInitialTax(self):
"""
Calculates taxable income and tax before credits.
"""
self.combined_return['taxinc'] = (self.combined_return['ebitda'] -
self.combined_return['taxDep'] -
self.combined_return['nid'] -
self.combined_return['sec199'])
self.combined_return['tau'] = self.btax_params['tau_c']
self.combined_return['taxbc'] = (self.combined_return['taxinc'] *
self.combined_return['tau'])
def calcFTC(self):
"""
Calculates foreign tax credit for 2014-2027.
"""
hclist = np.array(self.btax_params['ftc_hc'])
def calcWAvgTaxRate(year):
"""
Calculates the weighted average statutory corporate tax rate
in all OECD countries in a given year.
"""
assert year in range(1995, 2028)
year = min(year, 2016)
gdp_list = np.asarray(self.data.ftc_gdp_data[str(year)])
taxrate_list = np.asarray(self.data.ftc_taxrates_data[str(year)])
# remove observations with missing data
taxrate_list2 = np.where(np.isnan(taxrate_list), 0, taxrate_list)
gdp_list2 = np.where(np.isnan(taxrate_list), 0, gdp_list)
avgrate = sum(taxrate_list2 * gdp_list2) / sum(gdp_list2)
return avgrate
# Get foreign profits forecast
profits = np.asarray(self.data.ftc_other_data['C_total'][19:])
profits_d = np.asarray(self.data.ftc_other_data['C_domestic'][19:])
tax_f = np.zeros(14)
for i in range(14):
tax_f[i] = calcWAvgTaxRate(i + 2014)
ftc_final = ((profits - profits_d) * tax_f / 100. *
self.data.adjfactor_ftc_corp *
(1 - hclist)) * self.data.rescale_corp
self.combined_return['ftc'] = ftc_final
def calcAMT(self):
"""
Calculates the AMT revenue and PYMTC for 2014-2027
pymtc_status: 0 for no change, 1 for repeal, 2 for refundable
"""
# Get relevant tax information
taxinc = np.array(self.combined_return['taxinc'])
amt_rates = np.array(self.btax_params['tau_amt'])
ctax_rates = np.array(self.btax_params['tau_c'])
pymtc_status = np.array(self.btax_params['pymtc_status'])
# Check values for PYMTC status
for x in pymtc_status:
assert x in [0, 1, 2]
# Create empty arrays for AMT, PYMTC, and stocks (by status)
A = np.zeros(14)
P = np.zeros(14)
stockA = np.zeros(15)
stockN = np.zeros(15)
stockA[0] = ((self.data.trans_amt1 * self.data.userate_pymtc + self.data.trans_amt2 *
(1 - self.data.userate_pymtc)) / (1 - self.data.trans_amt1) * self.data.stock2014)
stockN[0] = self.data.stock2014 - stockN[0]
stockN[0] = (1 - self.data.trans_amt1) / (1 - self.data.trans_amt1 + self.data.trans_amt1 *
self.data.userate_pymtc + self.data.trans_amt2 *
(1 - self.data.userate_pymtc)) * self.data.stock2014
stockA[0] = self.data.stock2014 - stockN[0]
for i in range(14):
# Calculate AMT
if amt_rates[i] == 0.:
# If no AMT
A[i] = 0.
frac_amt = 0.
elif ctax_rates[i] <= amt_rates[i]:
# If AMT rate exceeds regular rate (all subject to AMT)
A[i] = ((amt_rates[i] - ctax_rates[i] + amt_rates[i] / self.data.param_amt) *
taxinc[i])
frac_amt = 0.999
else:
A[i] = (amt_rates[i] / self.data.param_amt *
np.exp(-self.data.param_amt * (ctax_rates[i] / amt_rates[i] - 1)) *
taxinc[i])
frac_amt = np.exp(-self.data.param_amt * (ctax_rates[i] / amt_rates[i] - 1))
# Adjust transition params for change in AMT frequency
alpha = max(0.0, min(1.0, self.data.trans_amt1 * (frac_amt / self.data.amt_frac)**0.5))
beta = (1 - alpha) * frac_amt / (1 - frac_amt)
if pymtc_status[i] == 0:
# No change from baseline
userate = self.data.userate_pymtc
elif pymtc_status[i] == 1:
# PYMTC repealed
userate = 0.0
else:
# PYMTC made fully refundable
userate = 1.0
P[i] = userate * stockN[i]
stockA[i+1] = (alpha * (stockA[i] + A[i]) +
beta * (stockN[i] - P[i]))
stockN[i+1] = ((1 - alpha) * (stockA[i] + A[i]) +
(1 - beta) * (stockN[i] - P[i]))
# Rescale for any cross-sector shifting
amt_final = A * self.data.rescale_corp
pymtc_final = P * self.data.rescale_corp
self.combined_return['amt'] = amt_final
self.combined_return['pymtc'] = pymtc_final
def calcTax(self):
"""
Calculates final tax liability.
"""
# Calculate general business credits
profit = np.asarray(self.data.gfactors['profit_d'])
gbc_2013 = np.asarray(self.data.historical_taxdata['gbc'])[-1]
gbc_res = profit[1:] / profit[0] * gbc_2013
self.combined_return['gbc'] = gbc_res
# Calculate final tax liability
self.combined_return['taxrev'] = (self.combined_return['taxbc'] +
self.combined_return['amt'] -
self.combined_return['ftc'] -
self.combined_return['pymtc'] -
self.combined_return['gbc'])
def calc_all(self):
"""
Executes all tax calculations.
"""
self.calcSec199()
self.calcInitialTax()
self.calcFTC()
self.calcAMT()
self.calcTax()
def getReturn(self):
"""
Returns the tax return information
"""
combined_result = copy.deepcopy(self.combined_return)
return combined_result
def get_tax(self):
"""
Returns the total tax liability.
"""
tax1 = np.array(self.combined_return['taxrev'])
return tax1
def __init__(self,
btax_params,
revenues,
deductions,
credit,
dmne=None,
data=None,
assets=None,
debts=None):
# Create an associated Data object
if isinstance(data, Data):
self.data = data
else:
self.data = Data()
if isinstance(btax_params, pd.DataFrame):
self.btax_params = btax_params
else:
raise ValueError('btax_params must be DataFrame')
if isinstance(revenues, pd.DataFrame):
self.revenues = copy.deepcopy(revenues)
else:
raise ValueError('revenues must be in DataFrame')
if isinstance(deductions, pd.DataFrame):
self.deductions = copy.deepcopy(deductions)
else:
raise ValueError('deductions must be in DataFrame')
if isinstance(credit, pd.DataFrame):
self.credits = copy.deepcopy(credit)
else:
raise ValueError('credits must be in DataFrame')
if dmne is None:
# Note: Don't do this in general
self.dmne = DomesticMNE(self.btax_params)
self.dmne.calc_all()
elif isinstance(dmne, DomesticMNE):
self.dmne = dmne
else:
raise ValueError('dmne must be a DomesticMNE object')
if assets is not None:
if isinstance(assets, Asset):
self.assets = assets
else:
raise ValueError('assets must be Asset object')
else:
self.assets = Asset(btax_params)
self.assets.calc_all()
if debts is not None:
if isinstance(debts, Debt):
self.debts = debts
else:
raise ValueError('debts must be Debt object')
else:
assets_forecast = self.assets.get_forecast()
self.debts = Debt(btax_params, assets_forecast)
self.debts.calc_all()
# Prepare unmodeled components of tax return
self.revenues['capgains'] = (
self.revenues['capgains'] *
(1. - self.btax_params['capgains_corp_hc']))
self.revenues['domestic_divs'] = (
self.revenues['domestic_divs'] *
self.btax_params['domestic_dividend_inclusion'])
self.revenues['total'] = (self.revenues['receipts'] +
self.revenues['rent'] +
self.revenues['royalties'] +
self.revenues['capgains'] +
self.revenues['domestic_divs'] +
self.revenues['other'] +
self.dmne.dmne_results['foreign_taxinc'])
self.deductions['charity'] = (self.deductions['charity'] *
(1. - self.btax_params['charity_hc']))
self.deductions['statelocaltax'] = (
self.deductions['statelocaltax'] *
(1. - self.btax_params['statelocaltax_hc']))
self.deductions['total'] = (
self.deductions['cogs'] + self.deductions['execcomp'] +
self.deductions['wages'] + self.deductions['repairs'] +
self.deductions['baddebt'] + self.deductions['rent'] +
self.deductions['statelocaltax'] + self.deductions['charity'] +
self.deductions['amortization'] + self.deductions['depletion'] +
self.deductions['advertising'] + self.deductions['pensions'] +
self.deductions['benefits'] + self.deductions['other'])
combined = pd.DataFrame({
'year':
range(START_YEAR, END_YEAR + 1),
'ebitda': (self.revenues['total'] - self.deductions['total'])
})
# Add tax depreciation
combined['taxDep'] = self.assets.get_taxdep()
self.combined_return = combined
class CorpTaxReturn():
"""
Constructor for the CorpTaxReturn object.
This class includes objects relevant to the calculation of
corporate income tax liability:
assets: an associated Asset object
debts: an associated debt object
combined_return: a DataFrame with tax calculations for each year
Parameters:
btax_params: dict of business tax policy parameters
assets: Asset object for the corporation
debts: Debt object for the corporation
earnings: list or array of earnings for each year in the budget window
"""
def __init__(self,
btax_params,
revenues,
deductions,
credit,
dmne=None,
data=None,
assets=None,
debts=None):
# Create an associated Data object
if isinstance(data, Data):
self.data = data
else:
self.data = Data()
if isinstance(btax_params, pd.DataFrame):
self.btax_params = btax_params
else:
raise ValueError('btax_params must be DataFrame')
if isinstance(revenues, pd.DataFrame):
self.revenues = copy.deepcopy(revenues)
else:
raise ValueError('revenues must be in DataFrame')
if isinstance(deductions, pd.DataFrame):
self.deductions = copy.deepcopy(deductions)
else:
raise ValueError('deductions must be in DataFrame')
if isinstance(credit, pd.DataFrame):
self.credits = copy.deepcopy(credit)
else:
raise ValueError('credits must be in DataFrame')
if dmne is None:
# Note: Don't do this in general
self.dmne = DomesticMNE(self.btax_params)
self.dmne.calc_all()
elif isinstance(dmne, DomesticMNE):
self.dmne = dmne
else:
raise ValueError('dmne must be a DomesticMNE object')
if assets is not None:
if isinstance(assets, Asset):
self.assets = assets
else:
raise ValueError('assets must be Asset object')
else:
self.assets = Asset(btax_params)
self.assets.calc_all()
if debts is not None:
if isinstance(debts, Debt):
self.debts = debts
else:
raise ValueError('debts must be Debt object')
else:
assets_forecast = self.assets.get_forecast()
self.debts = Debt(btax_params, assets_forecast)
self.debts.calc_all()
# Prepare unmodeled components of tax return
self.revenues['capgains'] = (
self.revenues['capgains'] *
(1. - self.btax_params['capgains_corp_hc']))
self.revenues['domestic_divs'] = (
self.revenues['domestic_divs'] *
self.btax_params['domestic_dividend_inclusion'])
self.revenues['total'] = (self.revenues['receipts'] +
self.revenues['rent'] +
self.revenues['royalties'] +
self.revenues['capgains'] +
self.revenues['domestic_divs'] +
self.revenues['other'] +
self.dmne.dmne_results['foreign_taxinc'])
self.deductions['charity'] = (self.deductions['charity'] *
(1. - self.btax_params['charity_hc']))
self.deductions['statelocaltax'] = (
self.deductions['statelocaltax'] *
(1. - self.btax_params['statelocaltax_hc']))
self.deductions['total'] = (
self.deductions['cogs'] + self.deductions['execcomp'] +
self.deductions['wages'] + self.deductions['repairs'] +
self.deductions['baddebt'] + self.deductions['rent'] +
self.deductions['statelocaltax'] + self.deductions['charity'] +
self.deductions['amortization'] + self.deductions['depletion'] +
self.deductions['advertising'] + self.deductions['pensions'] +
self.deductions['benefits'] + self.deductions['other'])
combined = pd.DataFrame({
'year':
range(START_YEAR, END_YEAR + 1),
'ebitda': (self.revenues['total'] - self.deductions['total'])
})
# Add tax depreciation
combined['taxDep'] = self.assets.get_taxdep()
self.combined_return = combined
def update_assets(self, assets):
"""
Updates the Asset object associated with the tax return.
"""
if isinstance(assets, Asset):
self.assets = assets
else:
raise ValueError('assets must be Asset object')
def update_debts(self, debts):
"""
Updates the Debt object associated with the tax return.
"""
if isinstance(debts, Debt):
self.debts = debts
else:
raise ValueError('debts must be Debt object')
def update_earnings(self, dearnings):
"""
Updates the earnings DataFrame associated with the tax return.
"""
assert len(dearnings) == NUM_YEARS
fearnings = np.asarray(self.dmne.dmne_results['foreign_taxinc'])
self.combined_return['ebitda'] = dearnings + fearnings
def calcInterestDeduction(self):
"""
Computes interest deduction.
"""
# Compute adjusted taxable income
adjTaxInc = np.maximum(
self.combined_return['ebitda'] - self.revenues['capgains'] -
self.combined_return['taxDep'] +
self.btax_params['adjustedTaxInc_def'] *
(self.combined_return['taxDep'] + self.deductions['amortization'] +
self.deductions['depletion']), 0.0001)
# Section 163(j) deduction limitation
deductible_int = (
adjTaxInc * self.btax_params['adjustedTaxInc_limit'] +
self.debts.get_intInc())
intded0 = self.debts.get_intDed()
intded1 = np.zeros(NUM_YEARS)
for i in range(NUM_YEARS):
if i > 0:
# Add disallowed interest as carryforward from prior year
intded0[i] = intded0[i] + intded0[i - 1] - intded1[i - 1]
intded1[i] = min(deductible_int[i], intded0[i])
# Apply interest haircuts
intTaxInc = (self.debts.get_intInc() *
(1. - self.btax_params['intIncome_corp_hc']) +
self.debts.get_muniInc() *
(1. - self.btax_params['muniIntIncome_corp_hc']))
intTaxDed = intded1 * (1. - self.btax_params['intPaid_corp_hc'])
# Compute net interest deduction
self.combined_return['nid'] = intTaxDed - intTaxInc
# Assign fraction of interest deductible to Debt object
fracded = intTaxDed / (self.debts.get_intPaid() + 0.000001)
self.btax_params['fracded_c'] = fracded
def calcInitialTax(self):
"""
Calculates taxable income and tax before credits.
"""
netinc1 = (self.combined_return['ebitda'] -
self.combined_return['taxDep'] -
self.combined_return['nid'])
self.combined_return['sec199'] = (netinc1 *
self.deductions['sec199share'] *
self.btax_params['sec199_rt'])
netinc2 = netinc1 - self.combined_return['sec199']
self.combined_return['taxinc'] = np.maximum(netinc2, 0.)
self.combined_return['tau'] = self.btax_params['tau_c']
self.combined_return['taxbc'] = (self.combined_return['taxinc'] *
self.combined_return['tau'])
def calcFTC(self):
"""
Gets foreign tax credit from DomesticMNE
"""
self.combined_return['ftc'] = self.dmne.dmne_results['ftc']
def calcAMT(self):
"""
Calculates the AMT revenue and PYMTC for [START_YEAR, END_YEAR]
"""
# Overall transition rates and parameters
trans_amt0 = self.data.trans_amt0
trans_amt1 = self.data.trans_amt1
userate = self.data.userate_pymtc
amt2013 = self.data.corp_tax2013.loc[40, 'ALL']
# Get relevant tax information
taxinc = np.array(self.combined_return['taxinc'])
amt_rates = np.array(self.btax_params['tau_amt'])
ctax_rates = np.array(self.btax_params['tau_c'])
pymtc_hc = np.array(self.btax_params['pymtc_hc'])
pymtc_refund = np.array(self.btax_params['pymtc_refund'])
# Create empty arrays for AMT, PYMTC, and stocks (by status)
A = np.zeros(NUM_YEARS)
P = np.zeros(NUM_YEARS)
stock0 = np.zeros(NUM_YEARS + 1)
stock1 = np.zeros(NUM_YEARS + 1)
# Set initial stocks using steady-state equations
stock0[0] = amt2013 / userate
stock1[0] = amt2013 * (trans_amt1 / (1. - trans_amt1) +
(1. - userate) / userate * (1. - trans_amt0) /
(1. - trans_amt1))
for iyr in range(NUM_YEARS):
# Calculate AMT
if amt_rates[iyr] == 0.:
# If no AMT
A[iyr] = 0.
frac_amt = 0.
# Update transition rate parameters
pi0 = 1.
pi1 = 0.
elif ctax_rates[iyr] <= amt_rates[iyr]:
# If AMT rate exceeds regular rate (all subject to AMT)
A[iyr] = ((amt_rates[iyr] - ctax_rates[iyr] +
amt_rates[iyr] / self.data.param_amt) * taxinc[iyr])
frac_amt = 0.999
# Update transition rate parameters
pi0 = 0.
pi1 = 1.
else:
A[iyr] = (amt_rates[iyr] / self.data.param_amt *
np.exp(-self.data.param_amt *
(ctax_rates[iyr] / amt_rates[iyr] - 1)) *
taxinc[iyr])
# Compute new fraction subject to AMT
frac_amt = np.exp(-self.data.param_amt *
(ctax_rates[iyr] / amt_rates[iyr] - 1))
# Adjust transition params for change in AMT frequency
pi1 = max(
min(
self.data.trans_amt1 *
(frac_amt / self.data.amt_frac)**0.5, 1.), 0.)
pi0 = max(min(1. - frac_amt * (1 - pi1) / (1 - frac_amt), 1.),
0.)
# Compute PYMTC
P[iyr] = ((pymtc_refund[iyr] * stock0[iyr] +
(1. - pymtc_refund[iyr]) * stock0[iyr] * userate) *
(1. - pymtc_hc[iyr]))
# Update credits carried forward
stock0[iyr + 1] = ((stock1[iyr] + A[iyr]) * (1. - pi1) +
(stock0[iyr] - P[iyr]) * pi0)
stock1[iyr + 1] = ((stock1[iyr] + A[iyr]) * pi1 +
(stock0[iyr] - P[iyr]) * (1. - pi0))
# Rescale for any cross-sector shifting
amt_final = A * self.data.rescale_corp
pymtc_final = P * self.data.rescale_corp
self.combined_return['amt'] = amt_final
self.combined_return['pymtc'] = pymtc_final
def calcTax(self):
"""
Calculates final tax liability.
"""
self.combined_return['gbc'] = self.credits['gbc']
# Calculate final tax liability
taxliab1 = (self.combined_return['taxbc'] +
self.combined_return['amt'] - self.combined_return['ftc'] -
self.combined_return['pymtc'] -
self.combined_return['gbc'])
self.combined_return['taxrev'] = np.maximum(taxliab1, 0.)
def calc_all(self):
"""
Executes all tax calculations.
"""
self.calcInterestDeduction()
self.calcInitialTax()
self.calcFTC()
self.calcAMT()
self.calcTax()
def getReturn(self):
"""
Returns the tax return information
"""
combined_result = copy.deepcopy(self.combined_return)
return combined_result
def get_tax(self):
"""
Returns the total tax liability.
"""
tax = np.array(self.combined_return['taxrev'])
return tax
assets14 = forecast[0]
return (scales, assets14, intpaid_model, intinc_model, muniinc_model)
(scales_corp, ast_c_14, intpaid_model, intinc_model, muniinc_model) = calcIDAdjustment(True)
(scale_ncorp, ast_nc_14, _, _, _) = calcIDAdjustment(False)
print(scales_corp)
print(scale_ncorp)
newdebt = copy.deepcopy(debt2)
newdebt['L_c'] = debt2['L_c'] * scales_corp[0]
newdebt['L_nc'] = debt2['L_nc'] * scale_ncorp
newdebt['At_c'] = debt2['At_c'] * scales_corp[1]
newdebt['An_c'] = debt2['An_c'] * scales_corp[2]
newdebt.to_csv(OUTPUT_PATH + 'debt_history.csv')
pol1 = Policy()
# Create Asset object
asset = Asset(pol1.parameters_dataframe(), True)
asset.calc_all()
# Create Debt object
debt = Debt(pol1.parameters_dataframe(), asset.get_forecast(), corp=True)
debt.calc_all()
df1 = pd.DataFrame({'inc_mod': intinc_model * scales_corp[1],
'paid_mod': intpaid_model * scales_corp[0],
'muni_mod': muniinc_model * scales_corp[2],
'inc_irs': taxint, 'paid_irs': intpaid, 'muni_irs': ntaxint})
df1.to_csv('debt_fit.csv')
class PassThrough():
"""
Constructor for the PassThrough class.
This contains the calculation of pass-through business income. All other
components of pass-through taxation occur through Tax-Calculator.
For now, a PassThrough object contains 6 different business entities:
sole proprietorship, positive net income
sole proprietorship, negative net income
S corporation, positive net income
S corporation, negative net income
partnership, positive net income
partnership, negative net income
Therefore, the process for modeling the pass-through sector evolves in
two stages. The first, like for the Corporation class, produces a single
Asset object, Debt object and earnings for the pass-through sector. Once
these are calculated, they are split between each of the 6 entities. The
results from these will later be used by the Investor class to distribute
the changes in business income to individuals in Tax-Calculator.
The following functions apply to the sector as a whole:
create_asset()
create_earnings()
create_debt()
real_activity()
"""
def __init__(self, btax_params):
# Store policy parameter objects
if isinstance(btax_params, pd.DataFrame):
self.btax_params = btax_params
else:
raise ValueError('btax_params must be DataFrame')
# Create Data object
self.data = Data()
# Create Asset object and calculate
self.asset = Asset(self.btax_params, corp=False, data=self.data)
self.asset.calc_all()
# Create earnings forecast
self.create_earnings()
def create_earnings(self):
"""
Creates the initial forecast for earnings. Static only.
"""
# Get initial EBITDA for 2014, for those in net income positions
sp_posinc2014 = np.array(self.data.sp_data['netinc'])[-1]
part_posinc2014 = np.array(self.data.partner_data['netinc_total'])[-1]
scorp_posinc2014 = np.array(self.data.Scorp_data['netinc_total'])[-1]
# Get initial EBITDA for 2014, for those in net loss positions
sp_neginc2014 = -np.array(self.data.sp_data['netloss'])[-1]
part_neginc2014 = -np.array(self.data.partner_data['netloss_total'])[-1]
scorp_neginc2014 = -np.array(self.data.Scorp_data['netloss_total'])[-1]
# Get growth factor for noncorporate business income and apply it
gfact_propinc = np.array(self.data.gfactors['propinc_nonfarm'])[1:]
sp_posinc = sp_posinc2014 / gfact_propinc[0] * gfact_propinc
part_posinc = part_posinc2014 / gfact_propinc[0] * gfact_propinc
scorp_posinc = scorp_posinc2014 / gfact_propinc[0] * gfact_propinc
sp_neginc = sp_neginc2014 / gfact_propinc[0] * gfact_propinc
part_neginc = part_neginc2014 / gfact_propinc[0] * gfact_propinc
scorp_neginc = scorp_neginc2014 / gfact_propinc[0] * gfact_propinc
# Aggregate and save EBITDAs
total_inc = (sp_posinc + sp_neginc + part_posinc + part_neginc +
scorp_posinc + scorp_neginc)
earnings_result = pd.DataFrame({'year': range(2014,2028),
'total': total_inc,
'SchC_pos': sp_posinc,
'SchC_neg': sp_neginc,
'partner_pos': part_posinc,
'partner_neg': part_neginc,
'Scorp_pos': scorp_posinc,
'Scorp_neg': scorp_neginc})
self.earnings = earnings_result
def create_debt(self):
"""
Creates the Debt object for the pass-through sector.
Note: create_asset must have already been called
"""
self.debt = Debt(self.btax_params, self.asset.get_forecast(),
data=self.data, corp=False)
self.debt.calc_all()
def real_activity(self):
"""
Produces a DataFrame of the pass-through sector's real activity.
Real measures are:
Capital stock
Investment
Depreciation (economic)
Debt
Interest paid
Earnings
Net income
Cash flow
Note that unlike for a corporation, the final real activity measures
(net income and cash flow) are pre-tax, as these would be passed to
units in Tax-Calculator.
"""
real_results = pd.DataFrame({'year': range(2014,2028),
'Earnings': self.earnings['total']})
real_results['Kstock'] = self.asset.get_forecast()
real_results['Inv'] = self.asset.get_investment()
real_results['Depr'] = self.asset.get_truedep()
real_results['Debt'] = self.debt.get_debt()
real_results['NIP'] = self.debt.get_nip()
real_results['NetInc'] = real_results['Earnings'] - real_results['Depr'] - real_results['NIP']
real_results['CashFlow'] = real_results['Earnings'] - real_results['Inv']
self.real_results = real_results
def calc_schC(self):
"""
Calculates net income for sole proprietorships
"""
SchC_results = pd.DataFrame({'year': range(2014,2028)})
# Update earnings
SchC_results['ebitda_pos'] = self.earnings['SchC_pos']
SchC_results['ebitda_neg'] = self.earnings['SchC_neg']
# Update tax depreciation
SchC_results['dep_pos'] = (self.asset.get_taxdep() * self.data.depshare_sp_posinc)
SchC_results['dep_neg'] = (self.asset.get_taxdep() * self.data.depshare_sp_neginc)
# Update interest deduction
SchC_results['intded_pos'] = (self.debt.get_nid() * self.data.intshare_sp_posinc)
SchC_results['intded_neg'] = (self.debt.get_nid() * self.data.intshare_sp_neginc)
# Update business net income
SchC_results['netinc_pos'] = SchC_results['ebitda_pos'] - SchC_results['dep_pos'] - SchC_results['intded_pos']
SchC_results['netinc_neg'] = SchC_results['ebitda_neg'] - SchC_results['dep_neg'] - SchC_results['intded_neg']
self.SchC_results = SchC_results
def calc_partner(self):
"""
Calculates net income for partnerships
"""
partner_results = pd.DataFrame({'year': range(2014,2028)})
# Update earnings
partner_results['ebitda_pos'] = self.earnings['partner_pos']
partner_results['ebitda_neg'] = self.earnings['partner_neg']
# Update tax depreciation
partner_results['dep_pos'] = (self.asset.get_taxdep() * self.data.depshare_partner_posinc)
partner_results['dep_neg'] = (self.asset.get_taxdep() * self.data.depshare_partner_neginc)
# Update interest deduction
partner_results['intded_pos'] = (self.debt.get_nid() * self.data.intshare_partner_posinc)
partner_results['intded_neg'] = (self.debt.get_nid() * self.data.intshare_partner_neginc)
# Update business net income
partner_results['netinc_pos'] = partner_results['ebitda_pos'] - partner_results['dep_pos'] - partner_results['intded_pos']
partner_results['netinc_neg'] = partner_results['ebitda_neg'] - partner_results['dep_neg'] - partner_results['intded_neg']
self.partner_results = partner_results
def calc_Scorp(self):
"""
Calculates net income for S corporations
"""
Scorp_results = pd.DataFrame({'year': range(2014,2028)})
# Update earnings
Scorp_results['ebitda_pos'] = self.earnings['Scorp_pos']
Scorp_results['ebitda_neg'] = self.earnings['Scorp_neg']
# Update tax depreciation
Scorp_results['dep_pos'] = (self.asset.get_taxdep() * self.data.depshare_scorp_posinc)
Scorp_results['dep_neg'] = (self.asset.get_taxdep() * self.data.depshare_scorp_neginc)
# Update interest deduction
Scorp_results['intded_pos'] = (self.debt.get_nid() * self.data.intshare_scorp_posinc)
Scorp_results['intded_neg'] = (self.debt.get_nid() * self.data.intshare_scorp_neginc)
# Update business net income
Scorp_results['netinc_pos'] = Scorp_results['ebitda_pos'] - Scorp_results['dep_pos'] - Scorp_results['intded_pos']
Scorp_results['netinc_neg'] = Scorp_results['ebitda_neg'] - Scorp_results['dep_neg'] - Scorp_results['intded_neg']
self.Scorp_results = Scorp_results
def calc_netinc(self):
"""
Runs all calculations for each entity and saves the net income results.
"""
self.calc_schC()
self.calc_partner()
self.calc_Scorp()
netinc_results = pd.DataFrame({'year': range(2014,2028)})
netinc_results['SchC_pos'] = self.SchC_results['netinc_pos']
netinc_results['SchC_neg'] = self.SchC_results['netinc_neg']
netinc_results['partner_pos'] = self.SchC_results['netinc_pos']
netinc_results['partner_neg'] = self.SchC_results['netinc_neg']
netinc_results['Scorp_pos'] = self.SchC_results['netinc_pos']
netinc_results['Scorp_neg'] = self.SchC_results['netinc_neg']
self.netinc_results = netinc_results
def calc_static(self):
"""
Runs the static calculations
"""
self.create_debt()
self.real_activity()
self.calc_netinc()
def update_legal(self, responses):
"""
Updates the rescale_corp and rescale_noncorp associated with each
Data associated with each object.
"""
self.data.update_rescaling(responses.rescale_corp, responses.rescale_noncorp)
self.asset.data.update_rescaling(responses.rescale_corp, responses.rescale_noncorp)
def update_investment(self, responses):
"""
Updates the Asset object to include investment response.
"""
# First, save the capital stock by asset type and year (for earnings)
self.old_capital_history = copy.deepcopy(self.asset.capital_history)
self.asset.update_response(responses.investment_response)
self.asset.calc_all()
def update_earnings(self, responses):
"""
Recalculates earnings using the old capital stock by asset type, the
new capital stock by asset type (based on the investment response),
and the marginal product of capital.
"""
Kstock_base = copy.deepcopy(self.old_capital_history)
Kstock_ref = copy.deepcopy(self.asset.capital_history)
deltaK = Kstock_ref - Kstock_base
changeEarnings = np.zeros((96, 14))
for j in range(14): # for each year
mpk = np.array(responses.investment_response['MPKnc' + str(j + 2014)])
for i in range(96): # by asset
changeEarnings[i,j] = deltaK[i,j] * mpk[i] * self.data.adjfactor_dep_noncorp
deltaE = np.zeros(14)
for j in range(14):
deltaE[j] = changeEarnings[:, j].sum()
earnings_old = np.array(self.earnings['total'])
ebitda_chgfactor = (earnings_old + deltaE) * self.data.rescale_noncorp / earnings_old
keylist = list(self.earnings)
for key in keylist:
self.earnings[key] = self.earnings[key] * ebitda_chgfactor
def update_debt(self, responses):
"""
Replaces the Debt object to use the new asset forecast and Data
"""
pctch_delta = np.array(responses.debt_response['pchDelta_corp'])
self.debt = Debt(self.btax_params, self.asset.get_forecast(),
data=self.data, response=pctch_delta, corp=False)
self.debt.calc_all()
def apply_responses(self, responses):
"""
Updates Data, Asset, earnings, and Debt to include
responses.
"""
assert isinstance(responses, Response)
self.update_legal(responses)
self.update_investment(responses)
self.update_earnings(responses)
self.update_debt(responses)
self.real_activity()
self.calc_netinc()
class Corporation():
"""
Constructor for the Corporation class.
This contains both the real and tax information relevant to the
corporate income tax.
"""
def __init__(self, btax_params):
# Store policy parameter objects
if isinstance(btax_params, pd.DataFrame):
self.btax_params = btax_params
else:
raise ValueError('btax_params must be DataFrame')
# Create Data object
self.data = Data()
# Create Asset object and calculate
self.asset = Asset(self.btax_params, corp=True, data=self.data)
self.asset.calc_all()
# Create DomesticMNE object
self.dmne = DomesticMNE(self.btax_params)
self.dmne.calc_all()
# Create earnings forecast
self.create_earnings()
def create_debt(self):
"""
Creates the Debt object for the Corporation.
Note: create_asset must have already been called
"""
self.debt = Debt(self.btax_params,
self.asset.get_forecast(),
data=self.data,
corp=True)
self.debt.calc_all()
def create_earnings(self):
"""
Creates the initial forecast for earnings. Static only.
"""
# Grab forecasts of profit growth
earnings_forecast = np.asarray(self.data.gfactors['profit'])
gfacts = earnings_forecast[1:] / earnings_forecast[0]
# 2013 values for non-modeled revenues
taxitems = np.array(self.data.corp_tax2013['ALL'])
receipts = taxitems[4] * gfacts
rent_inc = taxitems[7] * gfacts
royalties = taxitems[8] * gfacts
capgains = (taxitems[9] + taxitems[10] + taxitems[11] -
taxitems[32]) * gfacts
domestic_divs = taxitems[12] * gfacts
other_recs = taxitems[14] * gfacts
# 2013 values for non-modeled deductions and credits
cogs = taxitems[16] * gfacts
execcomp = taxitems[17] * gfacts
wages = taxitems[18] * gfacts
repairs = taxitems[19] * gfacts
baddebt = taxitems[20] * gfacts
rent_paid = taxitems[21] * gfacts
statelocaltax = taxitems[22] * gfacts
charity = taxitems[24] * gfacts
amortization = taxitems[25] * gfacts
depletion = taxitems[27] * gfacts
advertising = taxitems[28] * gfacts
pensions = taxitems[29] * gfacts
benefits = taxitems[30] * gfacts
sec199_base = taxitems[31] * gfacts
other_ded = taxitems[33] * gfacts
gbc = taxitems[42] * gfacts
# Save unodeled tax items
self.revenues = pd.DataFrame({
'year': range(START_YEAR, END_YEAR + 1),
'receipts': receipts,
'rent': rent_inc,
'royalties': royalties,
'capgains': capgains,
'domestic_divs': domestic_divs,
'other': other_recs
})
self.deductions = pd.DataFrame({
'year': range(START_YEAR, END_YEAR + 1),
'cogs': cogs,
'execcomp': execcomp,
'wages': wages,
'repairs': repairs,
'baddebt': baddebt,
'rent': rent_paid,
'statelocaltax': statelocaltax,
'charity': charity,
'amortization': amortization,
'depletion': depletion,
'advertising': advertising,
'pensions': pensions,
'benefits': benefits,
'sec199share': sec199_base,
'other': other_ded
})
self.credits = pd.DataFrame({
'year': range(START_YEAR, END_YEAR + 1),
'gbc': gbc
})
def file_taxes(self):
"""
Creates the CorpTaxReturn object.
"""
self.taxreturn = CorpTaxReturn(self.btax_params,
self.revenues,
self.deductions,
self.credits,
dmne=self.dmne,
data=self.data,
assets=self.asset,
debts=self.debt)
self.taxreturn.calc_all()
def real_activity(self):
"""
Produces a DataFrame of the corporation's real activity.
Real measures are:
Capital stock
Investment
Depreciation (economic)
Net debt
Net interest paid
Earnings
Tax liability
Net income
Cash flow
"""
real_results = pd.DataFrame({'year': range(START_YEAR, END_YEAR + 1)})
real_results['Earnings'] = (
self.revenues['receipts'] + self.revenues['rent'] +
self.revenues['royalties'] + self.revenues['capgains'] +
self.revenues['domestic_divs'] + self.revenues['other'] -
self.deductions['cogs'] - self.deductions['execcomp'] -
self.deductions['wages'] - self.deductions['repairs'] -
self.deductions['baddebt'] - self.deductions['rent'] -
self.deductions['charity'] - self.deductions['depletion'] -
self.deductions['advertising'] - self.deductions['pensions'] -
self.deductions['benefits'] - self.deductions['other'] +
self.dmne.dmne_results['foreign_directinc'] +
self.dmne.dmne_results['foreign_indirectinc'])
real_results['Kstock'] = self.asset.get_forecast()
real_results['Inv'] = self.asset.get_investment()
real_results['Depr'] = self.asset.get_truedep()
real_results['Debt'] = self.debt.get_debt()
real_results['NIP'] = self.debt.get_nip()
real_results['Tax'] = self.taxreturn.get_tax()
real_results['NetInc'] = (real_results['Earnings'] -
real_results['Depr'] - real_results['NIP'] -
real_results['Tax'] -
self.dmne.dmne_results['foreign_tax'] -
self.deductions['statelocaltax'])
real_results['CashFlow'] = (real_results['Earnings'] -
real_results['Inv'] - real_results['Tax'] -
self.dmne.dmne_results['foreign_tax'] -
self.deductions['statelocaltax'])
self.real_results = real_results
def calc_static(self):
"""
Runs the static calculations.
"""
self.create_debt()
self.file_taxes()
self.real_activity()
def update_legal(self, responses):
"""
Updates the rescale_corp and rescale_noncorp associated with each
Data associated with each object.
"""
self.data.update_rescaling(responses.rescale_corp,
responses.rescale_noncorp)
self.asset.data.update_rescaling(responses.rescale_corp,
responses.rescale_noncorp)
def update_investment(self, responses):
"""
Updates the Asset object to include investment response.
"""
# First, save the capital stock by asset type and year (for earnings)
self.old_capital_history = copy.deepcopy(self.asset.capital_history)
self.asset.update_response(responses.investment_response)
self.asset.calc_all()
def update_repatriation(self, responses):
"""
Updates the DomesticMNE object to include the repatriation response.
Also updates profits to reflect this response.
"""
# First, save current foreign earnings
self.dmne.update_profits(responses.repatriation_response,
responses.shifting_response)
self.dmne.calc_all()
def update_earnings(self, responses):
"""
Recalculates earnings using the old capital stock by asset type, the
new capital stock by asset type (based on the investment response),
and the marginal product of capital.
"""
Kstock_base = copy.deepcopy(self.old_capital_history)
Kstock_ref = copy.deepcopy(self.asset.capital_history)
changeEarnings = np.zeros((95, NUM_YEARS))
for iyr in range(NUM_YEARS): # for each year
ystr = str(iyr + START_YEAR)
mpk = np.array(responses.investment_response['MPKc' + ystr])
for i in range(95): # by asset
changeEarnings[i, iyr] = (Kstock_ref[ystr][i] -
Kstock_base[ystr][i]) * mpk[i]
deltaE = np.zeros(NUM_YEARS)
for iyr in range(NUM_YEARS):
deltaE[iyr] = changeEarnings[:, iyr].sum()
# Update new earnings
self.revenues['receipts'] = self.revenues['receipts'] + deltaE
def update_debt(self, responses):
"""
Replaces the Debt object to use the new asset forecast and Data
"""
pctch_delta = np.array(responses.debt_response['pchDelta_corp'])
self.debt = Debt(self.btax_params,
self.asset.get_forecast(),
data=self.data,
response=pctch_delta,
corp=True)
self.debt.calc_all()
def apply_responses(self, responses):
"""
Updates Data, Asset, earnings, Debt and CorpTaxReturn to include
responses. Then calc_all() for each object.
"""
assert isinstance(responses, Response)
self.update_legal(responses)
self.update_investment(responses)
self.update_repatriation(responses)
self.update_earnings(responses)
self.update_debt(responses)
self.file_taxes()
self.real_activity()
def get_netinc(self):
"""
Returns an array of the corporation's net income (after-tax).
"""
netinc = np.array(self.real_results['NetInc'])
return netinc
def get_taxrev(self):
"""
Returns an array of the corporation's tax liability.
"""
taxrev = np.array(self.real_results['Tax'])
return taxrev
