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,

A less elastic demand for a good could result from