Using data from the Fragile Families and Child Wellbeing Study, this brief examines the role of””marriage markets”” in explaining differences across racial and ethnic groups in rates of marriage in the year following a nonmarital birth. We use the term marriage market to refer to the supply of men relative to women in a local area within age and racial groups. Past research suggests that one reason for relatively low marriage rates among African-Americans is a shortage of African-American males. Our research finds that a shortage of men continues to influence marriage decisions even after a couple has already formed a relationship and recently had a child together. (Author abstract)