A bus is mostly filled with passengers and ready to travel from Los Angeles to San Francisco. At the last minute, a person comes running up to the bus and takes a seat. The change in the bus company's total cost as a result of transporting one more passenger on this trip is called:

In the long run, if 1,000 units are produced at a cost of $8,000 and 1,200 units at a cost of $9,200, then over this range of output there are

A) constant economies of scale. B) constant returns to scale. C) diseconomies of scale. D) economies of scale. E) constant diseconomies of scale.

According to the real business cycle theory, what is the principal cause of business cycle fluctuations?

What will be an ideal response?