Why is it a mistake to say marriage causes an earnings premium?
Saying that marriage causes an earnings premium is a mistake because it conflates correlation with causation. The evidence suggests that the premium is more reflective of the characteristics of men who choose to marry, rather than a direct outcome of being married, which can mislead interpretations of marriage's role in career success.
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This is one answer. The complete system — the psychology, the biology, and the method — is in the book.
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