The year in which euro coins and paper currency were introduced and participating "euro zone" countries withdrew old domestic currencies from circulation was

Economists define disposable income (Yd )

What will be an ideal response?

When there's uncertainty as to the length of a game

A) cooperation still does not occur, because cooperation unravels at the beginning of the game. B) cooperation can potentially occur if trigger strategies are adopted. C) firms will cooperate because they treat the game as one that is infinitely repeated. D) firms will randomly pick among the Nash equilibria.