What is the effect of dispersed levels of cognitive ability of members of a (business) team on their teamś performance? This paper reports the results of a field experiment in which 573 students in 49 teams start up and manage real companies under identical circumstances. We ensured exogenous...

This paper finds that returns to computer use do not vary with the intensity of computer use. This is evidence against the productivity interpretation of these returns and supports the view that returns to computer use can be attributed tounobserved heterogeneity.