def test_surplus_tax(self):
"""Practice problem 2.3
"""
sp.var('x p W')
benefit = et.benefit_from_demand(x, p, 100 - p)
sp.plot(benefit, (x, 0, 100))
cons = Consumer(x, p, benefit)
cons_sub = Consumer(x, p, benefit, other=W - x*p/2)
self.assertEqual(cons_sub.surplus().subs(p, 50) - cons.surplus().subs(p, 50),
1562.5)
def test_surplus_tax(self):
"""Practice problem 2.3
"""
sp.var('x p W')
benefit = et.benefit_from_demand(x, p, 100 - p)
sp.plot(benefit, (x, 0, 100))
cons = Consumer(x, p, benefit)
cons_sub = Consumer(x, p, benefit, other=W - x * p / 2)
self.assertEqual(
cons_sub.surplus().subs(p, 50) - cons.surplus().subs(p, 50),
1562.5)
def total_benefit(self):
return et.benefit_from_demand(self.q, self.p, self.demand)
