Because of the flaws of the concentration ratio as a measure of the extent of competition in an industry, some economists prefer another measure of competition, the Herfindahl-Hirschman Index

It is the responsibility of the Trading Desk at the Federal Reserve Bank of New York to implement policies in the form of

A) changes in the spread between the federal funds rate and the discount rate that are consistent with rules established by the twelve Federal Reserve bank presidents. B) variations in reserve requirements that are consistent with the announcements by the Chair of the Fed's Board of Governors. C) changes in foreign exchange rates that are consistent with policies established by the Secretary of the Treasury. D) buying or selling government securities that are consistent with the FOMC Directive.

The cookie company in the mall hires workers to produce cookies. The workers are paid $75 per day, and the cost of renting the space in the mall is $250 per day. The total costs when three workers are hired is

a. $75. b. $100. c. $150. d. $475.