In their May 6, 2007, column for the New York Times Magazine, Dubner and Levitt wonder: Why do Americans spend so much time and money performing menial tasks when they don’t have to? What’s with all the knitting, gardening, and – as the Census Bureau dubs it – “cooking for fun”? Why do we fill our hours with leisure activities that look an awful lot like work? Click here to read the article and here to comment. This blog post supplies additional research material.