During the past year or so, Bryan Caplan of George Mason University and the Econlog blog has been very visible as a result of his new book "Selfish Reasons to Have More Kids." Based on what I've read about the book, it applies economic thinking to child-rearing and one of the upshots is "it's less expensive and can be more fun than you think." (I've decided I need to read this book, even though my kids are basically in the final stages of growing up and I’ve already had fun.) This clearly connects to some of the early work on economics of family size, why we marry, have children, etc.
But my thoughts were moved to revisiting the issue after seeing this cartoon. I would welcome comments from anyone who has read Bryan's book.