To construct a supply curve, an economist needs data on price and quantity. Each point
on the supply curve is
a. supply of the product.
b. a quantity supplied at that price.
c. the amount that people want to buy.
d. the amount people want to sell to buyers of different incomes.
e. All of the above are correct.
The main reason why the economy’s aggregate supply curve slopes upward is that
a. as the price level rises, businesses incur additional costs.
b. businesses typically purchase labor and other inputs under long-term contracts that
fix the cost of the input in money terms.
c. as the price level rises, workers have higher real wages to spend for additional
consumer goods.
d. All of the above are correct.
In a free market, a given unit of an input will be used by the firm that