Modeling heaped count data

作者：Cummings Tammy H^*; Hardin James W; McLain Alexander C; Hussey James R; Bennett Kevin J; Wingood Gina M

来源：Stata Journal, 2015, 15(2): 457-479.

DOI：10.1177/1536867x1501500207

• st0388
• heaper
• ziheapcr
• heapr
• ziheapr
• count data
• heaping
• Poisson
• generalized Poisson
• negative binomial
• zero-inflation
• interval censored
• mixture
• rescaled

We present motivation and new commands for modeling heaped count data. These data may appear when subjects report counts that are rounded or favor multiples (digit preference) of a certain outcome, such as the number of cigarettes reported. The new commands for fitting count regression models (Poisson, generalized Poisson, negative binomial) are also accompanied by real-world examples comparing the heaped regression model with the usual regression model as well as the heaped zero-inflated model with the usual zero-inflated model.

• 出版日期2015