This paper draws on the case study literature on diagnostic imaging, on publicly available industry data, and on the business press. It also incorporates very preliminary findings from interviews and site visits by the author and others at five diagnostic imaging companies, two in the United...

Many economists and other social scientists and policymakers believe that the growth in inequality in the last two decades reflects mostly an imbalance between the demand for and the supply of employee skills driven by technological change, particularly the spread of computers. However, the...

We propose a new method to estimate the empirical pricing kernel based on option data. We estimate the pricing kernel nonparametrically by using the ratio of the risk-neutral density estimator and the subjective density estimator. The risk-neutral density is approximated by a weighted kernel...