New equilibrium is where; Demand after tax = Supply
300 - (P + T) = 2P
300 - P - T = 2P
300 - T = 3P
P = (300 - T)/3
P = 100 - T/3
At Q = 200 - 2T/3, price at which this quantity intersects demand curve;
Qd = 300 - P
200 - 2T/3 = 300 - P
P = 300 - 200 + 2T/3
P = 100 + 2T/3
Base of triangle is [(100 + 2T/3) - (100 - T/3)] = 100 + 2T/3 - 100 + T/3 = T
Height is 200 - 200 + 2T/3 = 2T/3
DWL = 1/2 x base x height = 1/2 x T x 2T/3 = T2/3
The government could decrease dead-weight loss by reducing the tax.
The government could increase tax revenue by reducing the tax to $ 150.
a.
Because tax revenue is equal to and , you can compute tax revenue as a function of in the following way:
Plugging in tax values of $0, $30, $90, $150, $210, $270, and $300, yields a tax revenue of $0, $5,400, $12,600, $15,000, $12,600, $5,400, and $0 respectively. See Section: Deadweight Loss and Tax Revenue as Taxes Vary.
b.
Recall that the area of a triangle is .
According to this graph, the base of the deadweight loss triangle is , and the height is .
c.
The area of the triangle that represents the deadweight loss is , where the base is the change in the price (which is the size of the tax) and the height is the amount of the decline in quantity (). Therefore, you can compute deadweight loss as a function of in the following way:
Plugging in tax values of $0, $90, $180, $240, and $300 yields deadweight losses of $0, $2,700, $10,800, $19,200, and $30,000, respectively. See Section: Deadweight Loss and Tax Revenue as Taxes Vary.
d.
The government now levies a tax on this good of $200 per unit.
Which of the following statements are true? Check all that apply.
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