Alfred S. Eichner (March 23, 1937 – February 10, 1988) was an American post-Keynesian economist who challenged the neoclassical price mechanism and asserted that prices are not set through supply and demand but rather through mark-up pricing. He is noted for his book The Megacorp and Oligopoly (1976), Toward a new economics: essays in post-Keynesian and institutionalist theory (1985). His Macrodynamics of Advanced Market Economies (1987) contains chapters on dynamics and growth, investment, finance and income distribution.