The Census Bureau publishes recurring reports on patterns of poverty. Because these reports are based on data collected in the Survey of Income and Program Participation (SIPP), they are not directly comparable to official poverty statistics drawn from the Current Population Survey (CPS).
Because of the way SIPP is designed it can provide information on issues such as the duration of poverty spells, the frequency of transitions into and out of poverty and how poverty dynamics very across demographic groups.
Frequency and Timespan: Irregular reports with multi-year averages, annual and some monthly data for 1984-1984 to the present
Geographic Level of Coverage: National
Publications available online
Edwards, Ashley N., Dynamics of Economic Well-being: Poverty, 2009-2011 (PDF) Current Population Reports, P70-137, U.S. Census Bureau, Washington, DC, 2014. Accessed 7/9/2014