In this paper we argue that univariate mixed models are not appropriate in measuring unobserved heterogeneity in studying IPOs survival in the aftermarket. We extend the methodology used up to now by developing a random effects model to account for heterogeneity among industries. Our results...

This note provides some evidence of the sensitivity of firm survival duration dependence to time aggregation, when durations are Weibull distributed. The results indicate that estimates of duration dependence are always positively biased: This bias increases with the width of time aggregation...

Event study analysis is a common methodology used in marketing to evaluate the impact of specific marketing activities. This study examines the impact of sponsorship announcements on the stock prices of sponsoring firms by using event study analysis. Due to the problem of non-normality on...