Accepting the Reality of Secular Stagnation

March 2020, Opinion: "A fundamental difference between natural science theories and social science theories is that natural science theories, if valid, hold for all times and places. In contrast, the relevance of economic theories depends on context. Malthus’s theory of food availability was valid for the millennia before he formulated it, but not after the industrial revolution. Keynes’s ideas were much more valid during the Great Depression than during the inflationary 1970s."