https://www.nber.org/papers/w20402
From Assortative to Ashortative Coupling: Men's Height, Height Heterogamy, and Relationship...
Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings...
assortativecoupling
https://www.bgsu.edu/ncfmr/resources/data/family-profiles/lamidi-brown-manning-assortative-mating-age-heterogamy-fp-15-14
Assortative Mating: Age Heterogamy in U.S. Marriages, 1964-2014
Most Recent Family Profile (FP-21-06) Homogamy in U.S. Marriages, 2019 Original Family Profile (FP-15-14) Assortative Mating: Age Heterogamy in U.S. Marriages,
assortative matingageheterogamyu1964