WHEN a Bangladeshi man goes to work on a construction site in the Middle East, his wife typically moves in with her husband's family. Not all wives enjoy this. They sweat in a strange kitchen, take care of a bossy mother-in-law and see their husbands only for a few weeks each year. And although their husbands send home plenty of money, they often send it to their parents, not their wives. Migration creates losers as well as winners.