Lerner, Abba Ptachya

Lerner, Abba Ptachya

(äb`ə pətäch`yə lĕr`nər, lûr`nər), 1903–82, American economist, b. Romania. After studying at the London School of Economics in the 1930s, he collaborated with KeynesKeynes, John Maynard, Baron Keynes of Tilton
, 1883–1946, English economist and monetary expert, studied at Eton and Cambridge. Early Career and Critique of Versailles
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 at Cambridge. Lerner came to the United States in 1937. His book on market pricing in a socialist economy, The Economics of Control (1944), developed the Marshall–Lerner criterion, based on the elasticity principle of Alfred MarshallMarshall, Alfred,
1842–1924, English economist. At Cambridge, where he taught from 1885 to 1908, he exerted great influence on the development of economic thought of the time; one of his students was John Maynard Keynes.
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. Lerner explained how a nation's balance of trade could affect the exchange rate in an economy where the currency has been devalued. In the late 1970s, Lerner wrote a highly detailed and respected work on inflation, The Market Anti-Inflation Plan.