Measuring the effect of education is one of the most difficult econometrics tasks due to the way that most societies pursue education -- one year at a time unti

Measuring the effect of education is one of the most difficult econometrics tasks due to the way that most societies pursue education -- one year at a time until you're done with it. There's not enough variation.... I was about to launch into a detailed technical explanation, but I think I'll just leave it at the intuitive one.