"1944-11-25Z"^^ . . "1913-12-16Z"^^ . . . . "Erwin Rothbarth (16 December 1913 \u2013 25 November 1944) was a German economist and statistician. He worked as a research assistant for John Maynard Keynes and made important contributions to the measurement of GDP and the modelling of individual consumption."@en . . "Erwin Rothbarth"@en .