def test_fixed_marginal(self): """Problem 5.4 """ sp.var('q p', positive=True) mkt = Market(q, p, demand=1000 - p, supply=sp.Eq(p, 100)) self.assertEqual(mkt.equilibrium(), (100, 900)) self.assertEqual(mkt.free_market_social_surplus(), 405000) mkt = Market(q, p, demand=1000 - p, supply=sp.Eq(p, 250)) self.assertEqual(mkt.free_market_social_surplus(), 281250) firm = Firm(q, p, variable_cost=q**2 / 2, SFC=0, FC=0) print firm.supply() market = Market(q, p, 100 - p, firm.supply()) print market.equilibrium()
def test_fixed_marginal(self): """Problem 5.4 """ sp.var('q p', positive=True) mkt = Market(q, p, demand=1000-p, supply=sp.Eq(p, 100)) self.assertEqual(mkt.equilibrium(), (100, 900)) self.assertEqual(mkt.free_market_social_surplus(), 405000) mkt = Market(q, p, demand=1000-p, supply=sp.Eq(p, 250)) self.assertEqual(mkt.free_market_social_surplus(), 281250) firm = Firm(q, p, variable_cost=q**2/2, SFC=0, FC=0) print firm.supply() market = Market(q, p, 100-p, firm.supply()) print market.equilibrium()
def test_subsidy(self): """Problem 3.3 """ sp.var('q p', positive=True) firm = Firm(q, p, q**2 / 1000., SFC=0, FC=0) self.assertEqual(sp.solve(firm.supply() - 1000, p)[0], 2)
def test_subsidy(self): """Problem 3.3 """ sp.var('q p', positive=True) firm = Firm(q, p, q**2/1000., SFC=0, FC=0) self.assertEqual(sp.solve(firm.supply() - 1000, p)[0], 2)