Tasha decides that when homes in her neighborhood are selling for $150,000 she will not sell her home. When average prices rise to $175,000, she decides that she will put her home on the market. This is an example of:

The short-run aggregate supply curve shifts leftward when the

A) price level increases. B) general level of technology advances. C) money wage rate increases. D) availability of on-the-job training expands to all workers.

If a monopoly's Lerner Index exceeds 1, then

A) it is earning maximum profit. B) it has ultimate market power. C) it must be pricing below marginal cost. D) marginal revenue is negative.