The article touches on both points you make: "Our study’s sample population—mostly white and relatively well-off professional women deciding about marriage in

The article touches on both points you make: "Our study’s sample population—mostly white and relatively well-off professional women deciding about marriage in the early 1990s—does limit the conclusions we can draw from it with confidence. For instance, our all-female sample cannot tell us anything about the effects of marriage on men. More rigorous work in this area is needed, since prior research indicates that marriage promotes men’s longevity and health even more strongly than women’s."