Every individual has a labor supply curve in each market where there is a possible use for his/her labor

The above figure shows the market for rice in Japan where price is expressed in dollars. S represents the domestic supply curve, and the horizontal line at P = $1 represents the world supply curve

If a $1 tariff is imposed on imported rice, the loss in social welfare is A) b + c + d + e. B) a. C) i. D) a + c + d + e.

In the long run, which of the following is considered a variable cost?

A) Expenditures for wages B) Expenditures for research and development C) Expenditures for raw materials D) Expenditures for capital machinery and equipment E) all of the above