Freakonomics Radio | 6 July 2017 | 0h 43m | Listen Later 
Over 40 percent of U.S. births are to unmarried mothers, and the numbers are especially high among the less-educated. Why? One argument is that the decline in good manufacturing jobs led to a decline in “marriageable” men. Cleverly uses high paying jobs for less educated men in the fracking boom as a natural experiment to explore marriage dynamics.