Refer to the normal-form game of price competition shown below. 
Firm B is the incumbent facing potential entry from its rival, firm A. Firm A's strategies consist of {entry, stay out}. Firm B's strategies are then {hard if entry; hard if stay out; soft if entry; soft if stay out}. Find the non-subgame Nash equilibrium to this game, if one exists.
A. There is no non-subgame Nash equilibrium to this game.
B. Firm A plays {entry}; firm B plays {soft if entry}.
C. Firm A plays {stay out}; firm B plays {hard if entry}.
D. Firm A plays {entry}; firm B plays {hard if entry}.
Answer: C
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Investment in both physical and human capital tends to enhance economic growth because it generally
a. increases consumption during the current period. b. makes it possible for individuals to produce more goods and services per hour worked. c. encourages firms to expand output by employing more low productivity workers. d. encourages workers to unionize and thereby fight for higher wages.
Refer to the table below. If the price of hamburger falls from $5 to $3, then the weekly market quantity demanded will:
The table below shows the weekly demand for hamburger in a market where there are just three buyers.
A. Increase from 24 to 52
B. Decrease from 52 to 24
C. Increase from 120 to 156
D. Increase from 29 to 55