Studies the trend in household income uncertainty using a novel approach that measures income uncertainty as the variance of forecast errors at each future horizon separately without imposing parametric restrictions on the underlying income shocks. Household income uncertainty has risen significantly and persistently since the early 1970s. Their measure of near-future uncertainty in total family non-capital income rose 40% between 1971 and 2002. This rising uncertainty is likely due to the increase in variances of both persistent and transitory income shocks. The increase was most pronounced among single-earner households and high-income households. Charts and tables. This is a print on demand report.