- Yahoo employees will eat more during the work day (the law of demand)
- Yahoo workers will gain weight (hyperbolic discounting, unless workers reduce their food consumption at other points in the day when they face the marginal cost of purchasing their own food).
- Yahoo employees will talk more face to face and this will lead to new ideas at the firm (social interactions is good for idea permutation)
- Yahoo will be able to attract and retain better workers at the same wage (compensating differentials)
This blog post is meant to show you how a non-experimental science runs experiments even when we don't have the resources or the subject pool to run a field experiment. The old "double-difference" is a powerful research tool.