Economist Paul Samuelson, 94, who won a Nobel Prize for his effort to bring mathematical analysis into economics, advised presidents since John F. Kennedy on tax policy and wrote a textbook read by ...

Samuelson Friedman: The Battle Over the Free Market, by Nicholas Wapshott (W. W. Norton, 385 pp., $28.95) Macroeconomics has come a long way in the last century. We’ve learned a lot about the forces ...