This article explores new methods for gathering and analyzing spatially rich demographic data using mobile phones. It describes a pilot study (the Human Mobility Project) in which volunteers around the world were successfully recruited to share GPS and cellular tower information on their...

A theoretical model is developed which yields the prediction that firms in more highly concentrated industries will be more likely to practice employment discrimination than other firms. The model is tested for both race and sex discrimination. The results generally confirm that firms in more...

After a survey of the empirical studies of Monsen, Chiu, and Cooley, of Kamerschen, and of Larner on the effects of the separation of ownership from control, this paper presents a study which shows that among firms with a high degree of monopoly power, management-controlled firms report...

Forcing what is essentially a hyperbolic relationship into a linear regression model can create a "hyperbolic bag." This bag takes on importance if it is systematically related to other variables in the regression model. For the case at hand, it appeared that using a linear model might overstate...