Paul Solman: On Tuesday, we posted the first transcript from a series of interviews I’ve done with Paul Samuelson over the years. This installment picks up where the last left off, explaining the most ...

The law of supply and demand explains how changes in a product's market price relate to its supply and demand. Demand for basic necessities is less responsive.

Just how important is money? Few would deny that it plays a key role in the economy.­ During the Great Depression of the 1930s, existing economic theory was unable either to explain the causes of the ...