Why do people marry people similar to them?

Anonymous

I have been reviewing marriage / divorce data and I have noticed a very obvious startling pattern amongst the vast majority of marriages. I would say that almost 90% of married couples are 5 years or less apart. Most people tend to be married to those who have similar educational attainment and socioeconomic status to them. Overwhelming majority of college educated men end up marrying college educated women. Vast majority of people tend to marry someone similar in age. Rich men tend to marry rich women. Poor men tend to marry poor women. Uneducated men tend to marry uneducated women.

Why do people marry people similar to them?
12 Opinion