Editing Paul Samuelson (section)

==Aphorisms and quotations==
[[Stanislaw Ulam]] once challenged Samuelson to name one theory in all of the social sciences that is both true and nontrivial. Several years later, Samuelson responded with [[David Ricardo]]'s theory of [[comparative advantage]]: "That it is logically true need not be argued before a mathematician; that is not trivial is attested by the thousands of important and intelligent men who have never been able to grasp the [[doctrine]] for themselves or to believe it after it was explained to them."<ref>{{cite book |first=Paul |last=Samuelson |year=1969 |chapter=The Way of an Economist |editor-first=P. A. |editor-last=Samuelson |title=International Economic Relations: Proceedings of the Third Congress of the International Economic Association |publisher=Macmillan |location=London |pages=1–11 }}</ref>

For many years, Samuelson wrote a column for ''[[Newsweek]]''. One article included Samuelson's most quoted remark and a favorite economics joke:

<blockquote>To prove that Wall Street is an early omen of movements still to come in GNP, commentators quote economic studies alleging that market downturns predicted four out of the last five recessions. That is an understatement. Wall Street indexes predicted nine out of the last five recessions! And its mistakes were beauties.<ref>{{cite news |last=Samuelson |first=Paul |title=Science and Stocks |work=Newsweek |date=September 19, 1966 |page=92 <!-- Newsweek doesn't have this online -->}}</ref></blockquote>

In the early editions of his famous, bestselling economics textbook Paul Samuelson joked that GDP falls when a man "marries his maid".<ref name="Economist 2016 Apr 30" />