"Household economies of scale arise when households with multiple members share public goods, making larger households … better off at lower per capita expenditures. While estimates of household economies of scale are critical for measuring … income and living standards, we do not know how these scale economies change over time. I use American household expenditure …

"This paper studies the effect that changing demographic patterns have had on the household saving rate in China. We …'s utility enter into parent's utility where parents choose the consumption level of the young until they leave the household … the household saving rate"--National Bureau of Economic Research web site …