This report describes recent results from four studies of programs that supplemented the earnings of low-income adults. The four studies, which took place beginning in the early 1990s, are the Canadian Self-Sufficiency Project (SSP), the Minnesota Family Investment Program (MFIP), Milwaukee's New Hope Project, and Connecticut's Jobs First program. The programs' supplements were intended to encourage work and to boost the income of adults who worked. Each was studied using a reliable research design that randomly assigned people to a program group that was eligible for earnings supplements or to a control group that was not. This report updates effects on economic outcomes after the earnings supplement programs ended.