Nobel prize winner Paul Krugman stated that, "In 1968 in one of the decisive intellectual achievements of postwar economics, Friedman not only showed why the apparent tradeoff embodied in the idea of the Phillips curve was wrong; he also predicted the emergence of combined inflation and high unemployment...dubbed ‘stagflation. ” Paul Krugman, Peddling Prosperity: Economic Sense and Nonsense in an Age of Diminished Expectations (1995) p 43 online