For firms in perfectly competitive market, the difference between the long run and the short run is that in the short run, firms

If the money supply is constant and the demand for money increases, what will happen to interest rates?

A monopolistically competitive firm usually charges less than a monopoly firm because

If demand is inelastic, then the 

Suppose that in the short run, price is greater than the average total cost (ATC) of production in a perfectly competitive market. What will happen to this market in the long run?

If two commodities are substitutes, then

Because the demand curve for a monopolist is downward sloping,

If a monopoly firm is continually earning above-normal profits, then

Which is the first stage in the family life cycle?

When marginal revenue intersects marginal cost on a graph,