Caitlin has just decided to order a computer that is made in Japan. She needs to convert U.S. dollars for Japanese yen. This conversion takes place in the

The logic of control variables in IV regressions

A) parallels the logic of control variables in OLS B) only applies in the case of homoskedastic errors in the first stage of two stage least squares estimation C) is different in a substantial way from the logic of control variables in OLS since there are two stages in estimation D) implies that the TSLS is efficient

After graduating from college, Jim had three choices, listed in order of preference: (1) Move to Florida from Philadelphia, (2) work in a car dealership in Philadelphia, or (3) play soccer for a minor league in Philadelphia. His opportunity cost of moving to Florida includes

a. the benefits he could have received from playing soccer b. the income he could have earned at the car dealership c. both a and b d. cannot be determined from the given information