1. The advantage of trade is a very important concept in economics. In examining trade between two individuals or two countries, you usually see at least one side specializing in the production of one good. A. What concept is most important in determining which good a person or nation will specialize in the production of

Consider a treasury bill with a rate of return of 5% and the following risky securities: security a: e(r) = .15; variance = .0400 security b: e(r) = .10; variance = .0225 security c: e(r) = .12; variance = .1000 security d: e(r) = .13; variance = .0625 the investor must develop a complete portfolio by combining the risk-free asset with one of the securities mentioned above. the security the investor should choose as part of her complete portfolio to achieve the best cal would be a. security a b. security b c. security c d. security d