In this article, a new model, the bivariate lognormal Poisson, is developed to examine the relationships between two count processes. This model is an extension of Schoenberg's (1985) univariate lognormal Poisson model. Although computationally more cumbersome, it is substantially more flexible...

Data from the NLSY (National Longitudinal Survey of Labor Market Experiences-Youth Cohort) indicate that about 7.3 percent of teenage males become fathers and that very few of these fathers live with their children. Father absence and the concurrent increase in female-headed households are...

In this paper we examine the productive performance of a group of three East European carriers and compare it to thirteen of their West European competitors during the period 1977–1990. We first model the multiple output/multiple input technology with a stochastic distance frontier using...

In this paper we carry out technical efficiency and productivity growth comparisons among the four largest European carriers and eight of their American counterparts. The time period of our comparisons is 1976 through 1986. This is a particularly interesting period since it begins just after the...