Christie and Schultz (1994), (Journal of Finance, 49, 1813–1840) find that market makers in many active Nasdaq stocks avoid odd-eighth quotes. This paper studies 67 (58) Nasdaq stocks whose market makers initiate (withdraw) odd-eighth quotes. These regime shifts are often completed within the span of a day, and coincide with dramatic changes in dollar, percentage and effective spreads. In most cases, we are unable to identify comparable changes in the costs of making markets. We do identify long-run changes in average prices that may provide a partial explanation. However, we also find that these patterns are not shared by stocks traded in auction markets.

Estimates from the Panel Study of Income Dynamics indicate that African-American men are one-third as likely to be self-employed as white men. The large discrepancy is due to a black transition rate into self-employment that is approximately one-half the white rate and a black transition rate out of self-employment that is twice the white rate. Using a new variation of the Blinder-Oaxaca decomposition technique, the author finds that racial differences in asset levels and probabilities of having self-employed fathers explain a large part of the gap in the entry rate, but almost none of the gap in the exit rate. Copyright 1999 by University of Chicago Press.

Relative performance evaluation (RPE) is likely to improve boards of director's ability to identify unfit CEOs, and competition is likely to enhance the usefulness of RPE. Consistent with our hypotheses, the frequency of CEO turnover is greater in highly competitive industries than in less competitive industries. We also find that RPE-based (firm-specific) accounting measures are more closely associated with CEO turnover in high (low) competition industries than in low (high) competition industries. These findings suggest that the lack of support for RPE in prior studies results from not considering the effects of competition.

This paper establishes the asymptotic distribution of an extremum estimator when the true parameter lies on the boundary of the parameter space. The boundary may be linear, curved, and/or kinked. Typically the asymptotic distribution is a function of a multivariate normal distribution in models without stochastic trends and a function of a multivariate Brownian motion in models with stochastic trends. The results apply to a wide variety of estimators and models. Examples treated in the paper are: (i) quasi-ML estimation of a random coefficients regression model with some coefficient variances equal to zero and (ii) LS estimation of an augmented Dickey-Fuller regression with unit root and time trend parameters on the boundary of the parameter space.