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The March Current Population Survey (CPS) is the primary data source for estimation of levels and trends in labor earnings and income inequality in the USA. Time-inconsistency problems related to top coding in theses data have led many researchers to use the ratio of the 90th and 10th percentiles of these distributions (P90/P10) rather than a more traditional summary measure of inequality. With access to public use and restricted-access internal CPS data, and bounding methods, we show that using P90/P10 does not completely obviate time-inconsistency problems, especially for household income inequality trends. Using internal data, we create consistent cell mean values for all top-coded public use values that, when used with public use data, closely track inequality trends in labor earnings and household income using internal data. But estimates of longer-term inequality trends with these corrected data based on P90/P10 differ from those based on the Gini coefficient. The choice of inequality measure matters.

This chapter discusses the impact of the 2008 Sichuan earthquake on household income, consumption, and income inequality using a unique dataset collected in rural Sichuan. We find that household income fell by 14 percent because of the earthquake and that income inequality did not increase. With regard to government support, living subsidies were more than enough to offset losses in annual income, but reconstruction aid, such as grants and bank loans for housing, accounted for less than 60 percent of total house-rebuilding costs. ; PR ; IFPRI1; CRP2 ; DSGD; PIM ; CGIAR Research Program on Policies, Institutions, and Markets (PIM)