For many years short wave radios were a way of getting news from faraway places and in difficult conditions. but as new technologies have spread, the people listening to these devices has decreased. (source: the economist, july 7, 2012) as new technology creates substitutes for short-wave radios, the demand for short-wave radios and the consumer surplus from short-wave radios

Eileen's elegant earrings produces pairs of earrings for its mail order catalogue business. each pair is shipped in a separate box. she rents a small room for $150 a week in the downtown business district that serves as her factory. she can hire workers for $275 a week. there are no implicit costs. what is the marginal product of the second worker?

An investment counselor calls with a hot stock tip. he believes that if the economy remains strong, the investment will result in a profit of $40 comma 00040,000. if the economy grows at a moderate pace, the investment will result in a profit of $10 comma 00010,000. however, if the economy goes into recession, the investment will result in a loss of $40 comma 00040,000. you contact an economist who believes there is a 2020% probability the economy will remain strong, a 7070% probability the economy will grow at a moderate pace, and a 1010% probability the economy will slip into recession. what is the expected profit from this investment?

When the federal reserve buys and sells bonds to member banks, it is called a. monetary policy b. reserve ratio c. interest rate adjustment d. open market operations