Alogical starting point from which the study of international trade begins is a. the principle of comparative advantage. b. the principle of absolute advantage. c. the recognition that not all markets are competitive. d. the recognition that government intervention in markets sometimes enhances the economic welfare of the society.

Aproperty title search firm is contemplating using online software to increase its search productivity. currently an average of 40 minutes is needed to do a title search. the researcher cost is $2 per minute. clients are charged a fee of $400. company a's software would reduce the average search time by 10 minutes, at a cost of $3.50 per search. company b's software would reduce the average search time by 12 minutes at a cost of $3.60 per search. which option would have the higher productivity in terms of revenue per dollar of input?