Which of the following economists is/are considered the leader(s) in the theory of market behavior?
(a) Alfred Marshall
(b) Adam Smith
(c) David Ricardo
(d) All of the above
(d)
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The sale of goods abroad at a price below their cost and below the price charged in the domestic market is called
A) priming. B) coping. C) invading. D) dumping.
A constant-cost industry has an infinitely elastic long-run supply curve.
Answer the following statement true (T) or false (F)
Refer to the information provided in Figure 7.9 below to answer the question(s) that follow. 
Figure 7.9Refer to Figure 7.9. The slope of isocost AB is
A. -1. B. 0. C. 1. D. indeterminate from this information, as the prices of capital and labor are not given.
Refer to the table. Over the $8-$6 price range, supply is:
A. inelastic.
B. elastic.
C. perfectly inelastic.
D. perfectly elastic.