Title: The relocation decisions of working couples
Description: "Most prime-age married couples in the U.S.  today have two labor force participants.  Migration decisions are more complicated for two-earner couples than for one-earner couples because any gain from moving that accrues to one spouse must be great enough to offset any loss to the other spouse.  This paper estimates the extent to which internal migration is depressed by rising earnings equality among spouses.  The results indicate that couples' migration propensities are substantially lower the more equal spouses' labor incomes"--Federal Reserve Board web site.