We demonstrate that the conventional practice of running firm investment regressions on beginning-of-period average Q cannot recover structural parameters related to adjustment costs. We propose two new methods of estimating these structural parameters by using financial market information...

This paper studies the responsiveness of firm investment to shocks in the input factor and output prices (the market conditions) by using stock market information on excess returns. The 'q' theory of investment is modified to allow for heterogeneous capital, ex post inflexible technology, and...

We assess the importance of interpersonal income comparisons using data on suicide deaths. We examine whether suicide risk is related to others' income, holding own income and other individual and environmental factors fixed. We estimate models of the suicide hazard using two independent data...

The proliferation of R&D tax incentives among U.S. states in recent decades raises two questions: (i) Are these tax incentives effective in increasing in-state R&D? (ii) How much of any increase is due to R&D being drawn away from other states? This paper answers (i) "yes" and (ii) "nearly all."...