This 1958 Journal of Political Economy paper by Paul Samuelson builds a deliberately stripped-down model of a world in which goods cannot be stored or invested -- nothing "keeps" -- so people can only …
PublishedClassicThe Review of Economics and StatisticsPublished May 1939
This short 1939 note by Paul Samuelson formalizes Alvin Hansen's combination of Keynes's income-expenditure multiplier with the accelerator principle of induced private investment.