What accounts for the differences in prices of yogurt?  Well, there’s different size cups, different ingredients, different quality ingredients, some have nuts, brand name recognition, seems like a lot of things could drive price differences.

What accounts for differences in prices of female eggs on college campuses?  SAT scores.

“Holding all else equal, an increase of one hundred SAT points in the score of a typical incoming student increased the compensation offered to oocyte donors at that college or university by $2,350,” Levine reports. When the ad was placed for a specific couple, the premium was higher: $3,130 per 100 SAT points. And when an egg donor agency placed the ad on behalf of the couple, the bonus per 100 points rose to $5,780.

Here’s the report.