In addition to income differences, wealth inequality may be driven by differences in the saving behavior, or in the intergenerational transfers received. Analyzing the empirical evidence to tell apart different potential sources of wealth inequality is challenging. Individual saving cannot be measured directly but must be computed from other data, either as the first difference in wealth, or as income minus consumption. For this reason there are fewer studies that document the heterogeneity in saving rates; their findings suggest significant differences in saving behavior across various groups. (See Browning and Lusardi [16] for a review of the literature.) Dynan et al. [35] show that higher-lifetime income households save a larger fraction