As patent data become more available in machine-readable form, an increasing number of researchers have begun to use measures based on patents and their citations as indicators of technological output and information flow. This paper explores the economic meaning of these citation-based patent...

Japanese stock returns are even more closely related to their book-to-market ratios than are their U.S. counterparts, and thus provide a good setting for testing whether the return premia associated with these characteristics arise because the characteristics are proxies for covariance with...

We lead off by discussing a number of theoretical reasons for expecting various relationships between a firm's unfunded pension liability and its market value. We then discuss our doubts about the methodology of earlier papers which studied the empirical relation between funding and market value...

We use textual analysis of high-dimensional data from patent documents to create new indicators of technological innovation. We identify significant patents based on textual similarity of a given patent to previous and subsequent work: these patents are distinct from previous work but are...

Standard theories of corporate ownership assume that because markets are efficient, insiders ultimately bear agency costs and therefore have a strong incentive to minimize conflicts of interest with outside investors. We show that if equity is overvalued, however, mispricing offsets agency costs...

This paper uses the theories of price discrimination and optimal taxation to investigate effects of underwater mortgages on foreclosures and the incentives to earn income, and the degree to which those effects are shaped by public policy. I find that the federal government's means-tested...

One measure of the health of the Social Security system is the difference between the market value of the trust fund and the present value of benefits accrued to date. How should present values be computed for this calculation in light of future uncertainties? We think it is important to use...