The marginal product of capital is:
a. output divided by capital input.
b. additional output produced when one additional unit of capital is added.
c. additional output produced when one additional unit of capital and one additional unit of labor are added.
d. the value of additional output when one dollar's worth of additional capital is added.

The basic difference between macroeconomics and microeconomics is that: a. microeconomics looks at the forest (aggregate markets) while macroeconomics looks at the trees (individual markets). b. macroeconomics is concerned with groups of individuals while microeconomics is concerned with single countries. c. microeconomics is concerned with the trees (individual markets) while macroeconomics is concerned with the forest (aggregate markets). d. macroeconomics is concerned with generalization while microeconomics is concerned with specialization.