The key characteristic of macroeconomics is the process of aggregation

Which of the following equations does NOT state a condition required for equilibrium output:?

A) Y = C(Yd) + I + G + CA(EP*/P,Yd) B) Y = C(Y - T) + I + G + CA(EP*/P,Y - T) C) Y = D(EP*/P,Y - T,I,G) D) R = R* + (EP/E) E) Y = D(EP*/P,Yd,I,G)

The main difference between the price-quantity graph of a perfectly competitive firm and a monopoly is

A) that the competitive firm's demand curve is horizontal, while that of the monopoly is downward sloping. B) that a monopoly always earns an economic profit while a competitive company always earns only normal profit. C) that a monopoly maximizes its profit when marginal revenue is greater than marginal cost. D) that a monopoly does not incur increasing marginal cost.