Marriage, partnership, and family formation

1. The decline and delay of marriage.
   1. Rising age at first marriage.
   2. Declining marriage rates.
   3. Cohabitation and alternative household structures.
   4. The relationship between marriage and fertility.
2. Changing marriage markets.
   1. Education and assortative mating.
   2. Income and employment.
   3. Changing expectations of partners.
   4. Sex ratios and geographic imbalances.
   5. Dating apps and digital courtship.
3. Partnership instability.
   1. Divorce.
   2. Delayed commitment.
   3. Single adulthood.
   4. Childbearing outside marriage.