[Change and consistency in nuptiality in Mexico].
The author uses census data to analyze recent trends in nuptiality in Mexico. She notes that "the fact that census data include both married and common-law couples enables...[questions] to be answered at the same time as it allows one to trace the development of the main indexes of marriage rates from 1930 to 1990. Differences between the sexes are established to provide a fuller analysis and a distinction is made between changes experienced by common-law and married couples." (SUMMARY IN ENG)