The Panzar-Rosse model has been widely applied to assess competitive conduct, often in specifications controlling for firm scale or using a price equation. We show that neither a price equation nor a scaled revenue function yields a valid measure for competitive conduct. Moreover, even an...

Chung and Cox (1994) provided an intuitively appealing stochastic model indicating that superstars may exist regardless of talent, giving rise to the Yule distribution. We adopt a different empirical approach and test its goodness of fit using a parametric bootstrap and several powerful test...

This paper analyzes sickness absenteeism among self-employed in the Netherlands. Using a unique data set provided by a large Dutch private insurance company, we assess the determinants of sick leave durations. Our study suggests that several risk factors affect the sick leave durations of...

Our aim in this paper is to apply principles from modern meta-analysis to identify differences and commonalities in patterns of explanatory variables for varying price elasticities for public transport in different countries. In addition to the synthesis and analysis of empirical data on these...

This paper emphasizes the importance of quantitative comparative research in the social sciences. For that purpose a great variety of modem classification methods is available. The paper aims to give a selective overview of major classes of these methods and highlights the advantages and...

International commercial banks, institutional investors, and private investors have become increasingly interested in financing microfinance institutions (MFIs). This paper investigates whether adding microfinance funds to a portfolio of risky international assets yields diversification gains....

This article applies quantile regression to assess the factors that influence the risk of incurring high trading costs. Using data on the equity trades of the world's second largest pension fund in the first quarter of 2002, we show that trade timing, momentum, volatility and the type of broker...