Since 1925, the longest recession in the United States lasted:

If two investments are perfectly positively correlated:

A. there is no benefit from diversification. B. bets are perfectly hedged and risks are canceled out. C. diversification reduces risk without changing the expected payoff. D. diversification reduces both risk and the expected payoff.

Each of the following is an example of price discrimination except

A. senior citizen discounts at restaurants. B. lower-priced movie tickets at "rush hour" to attract customers at dinner time. C. high-priced tickets just behind the bench of the NBA championship team. D. student rates for subscriptions to Business Week.