This paper explores differences in the frequency with which students from different schools reach high levels of math achievement. Data from the American Mathematics Competitions is used to produce counts of high-scoring students from more than two thousand public, coeducational, non-magnet,...

This paper is concerned with the analysis of zero-inflated count data when time of exposure varies. It proposes a new zero-inflated count data model that is based on two homogeneous Poisson processes and accounts for exposure time in a theory consistent way. The new model is used in an...

The widespread popularity and use of both the Poisson and negative binomial models for count data arises, in part, from their derivation as the number of arrivals in a given time period assuming exponenitally distributed interarrival times (without and with heterogeneity in the underlying base...

This paper analyses the location choices of new entrants to Auckland between 1996 and 2006, to identify a systematic relationship between residential location choices and features of local areas such as population density, the population composition of the area or its neighbourhood,...

This paper analyses the location choices of new entrants to Auckland between 1996 and 2006, to identify a systematic relationship between residential location choices and features of local areas such as population density, the population composition of the area or its neighbourhood,...