Mainstream economic theories are not adequately explaining consumer and government behavior in this cycle. Wall Street practitioners are thus turning to alternative theories, and the Levy-Kalecki formula—independently developed by New York physicist-entrepreneur Jerome Levy in 1914 and Polish economist Michal Kalecki in 1935 and then unified by American economist Hyman Minsky in the 1960s—is helping to better elucidate the relationship among debt, savings, and profits.