The endogenous variable in the liquidity preference function is ________

Which of the following goods is likely to have a derived demand?

a. Tractor b. T-shirt c. Italian food d. Residential buildings e. Cigarettes

It is the custom for paper mills located alongside the Layzee River to discharge waste products into the river. Operators of hydroelectric generating plants on the river find they must clean up the river's water before it flows through their equipment. The above situation is an example of:

A. an external economy. B. the exclusion principle. C. a spillover cost. D. a spillover benefit.