Under a gold standard, a continual balance of surplus in any country can be sustained only as long as the country's gold reserves hold out

How is a monopolistically competitive firm similar to a monopoly firm?

A) Both produce where marginal revenue equals marginal cost. B) Both will observe entry into the industry if economic profit is positive. C) Both produce a unique good. D) Both produce where price equals marginal cost.

When disposable income is 6000, how much is consumption?