When bank deposits increase from $1 million to $2 million, banks' required reserves increase from $100,000 to $200,000. The required reserve ratio is ________

In an oligopoly, there are

A) many firms and barriers to entry. B) many firms and no barriers to entry. C) few firms and barriers to entry. D) few firms and no barriers to entry. E) barriers to entry and only one firm.

The longer the time period considered, the elasticity of supply tends to: a. decrease

b. remain constant. c. increase. d. converge to zero.