On average across the world, the underground economy is worth about:

Diseconomies of scale occur when

A) long-run average costs fall as a firm expands its plant size. B) long-run labor costs rise as a firm increases its output. C) short-run average costs rise as a firm expands its plant size. D) long-run average costs rise as a firm increases its output.

In the market for widgets, the supply curve is the typical upward-sloping straight line, and the demand curve is the typical downward-sloping straight line. The equilibrium quantity in the market for widgets is 200 per month when there is no tax. Then a tax of $5 per widget is imposed. The price paid by buyers increases by $2 and the after-tax price received by sellers falls by $3 . The

government is able to raise $750 per month in revenue from the tax. The deadweight loss from the tax is a. $250. b. $125. c. $75. d. $50.