Use the following statements to answer this question: I. If mixed strategies are allowed, every game has at least one Nash equilibrium. II. The maximin strategy is optimal in the game of "matching pennies."

Economists have used ________ and ________ in experiments designed to determine whether consumers care about fairness when they make decisions

A) the income effect; the substitution effect B) Giffen goods; luxury goods C) network externalities; the endowment effect D) the ultimatum game; the dictator game

Consumption spending refers to ________ spending on goods and services

A) government B) business C) foreign D) household