The definition of egalitarian marriage is either division of household labor (reduces probability of divorce for women: http://jfi.sagepub.com/content/24/1/51.short), predominantly equal contributions of income (no effect on divorce relative to men earning more, decreases probability relative to women earning more: http://www.addegem-asso.fr/docs/PapersDMM2009/7.pdf) and egalitarian gender roles (lowers probability of divorce when held by men: http://books.google.com/books?id=Yv8KZnvVbTsC&lpg=PA225&... )