A bivariate count data model for household tourism demand
利用瑞典旅游数据，采用二元障碍模型将参与决策（是否旅行过夜）与数量决策（旅行次数和过夜天数）分开，并用二元混合泊松对数正态模型分析两者相关性，发现旅行次数与过夜天数呈负相关。
Abstract Households' choice of the number of leisure trips and the total number of overnight stays is empirically studied using Swedish tourism data. A bivariate hurdle approach separating the participation (to travel and stay the night or not) from the quantity (the number of trips and nights) decision is employed. The quantity decision is modelled with a bivariate mixed Poisson lognormal model allowing for both positive as well as negative correlation between count variables. The observed endogenous variables are drawn from a truncated density and estimation is pursued by simulated maximum likelihood. The estimation results indicate a negative correlation between the number of trips and nights. In most cases own price effects are as expected negative, while estimates of cross‐price effects vary between samples. Copyright © 2005 John Wiley & Sons, Ltd.