W. Bradford Wilcox, a sociologist, has written two recent papers noting that children in conservative parts of the country are more likely to grow up with both parents than in liberal ones. In both articles, he challenged the view that blue states are more conducive to stable family life than red states.

Now Mr. Wilcox, a professor at the University of Virginia, has published an analysis of data about individual families rather than geographical areas. And he argues this data continues to support his case that the so-called blue-state family model is overrated.

Self-identified Republicans are more likely to be married and less likely to be divorced than self-identified Democrats, write he and Nicholas H. Wolfinger, based on an analysis of the General Social Survey, an oft-studied national poll. Republicans also report being more satisfied with their marriages on average than Democrats.

Among married people between the ages of 20 and 60, 67 percent of Republicans report being “very happy” with their marriages. Among Democrats, the share was 60, as it is among independents, write Mr. Wilcox and Mr. Wolfinger, a professor at the University of Utah.