Bryan Caplan is the author of the book Selfish Reasons to Have More Kids: Why Being a Great Parent is Less Work and More Fun Than You Think, a summary of which you can read here in The Wall Street Journal.
Caplan told me, “The long-term effect parents have on their kids is very small, or zero in a lot of cases. And then realizing parents seem to be pushing themselves very hard, not having a lot of fun in a lot of cases, often pushing their kids in ways the kids don’t enjoy either. The long-term benefit would seem to be the only reason to do it. It’s not there. So when you put it altogether you realize parents have a lot of unnecessary unhappiness … They’re pushing themselves really hard, getting no return and then feeling frustrated.”
Caplan, a George Mason economics professor, has oodles of research that backs all this up.
I will publish the link to the article here when it is finished.
UPDATE: Here is the link to the article on why men should make a baby or five.