Investigates the influence of wives' earnings on distribution of family earnings. In the process, some differences in the manner in which family earnings are distributed within racial groups are highlighted. Earnings of wives equalize income distributions in white families but increase dispersion among blacks. Because they have conflicting effects, covariances between spouses in their wage rates and labor supply are isolated. Male and female wage functions are adjusted for sample censoring to fill out true population variances and covariances in wages across all families. Due to the larger positive correlation in wages of black spouses, black family earnings would be distributed more unequally even if all individuals worked the same amount. This labor supply analysis indicates that white families attempt to stabilize family earnings with some family members increasing their labor supply in response to decline in participation of other family members. This compensatory function of wives' earnings is much less prevalent in black families.