Refer to the table below. Julia's opportunity cost of making a cake is: Time to Make a PieTime to Make a CakeMartha60 minutes80 minutesJulia50 minutes60 minutes

Statistical studies in the United States have reached the conclusion that for low-income workers

a. the substitution effect is greater than the income effect. b. the income effect is greater than the substitution effect. c. the income effect is about equal to the substitution effect. d. the substitution effect is of the "wrong" sign.

State sales taxes are operated as a system of

A) ad valorem taxation. B) unit taxation. C) income taxation. D) revenue minimizing taxation.