Journal Article

A zero-inflated regression model for grouped data

By Sarah Brown, Alan Duncan, Mark N. Harris, Jennifer Roberts and Karl Taylor

Publication details

Publication date
Published in
Oxford Bulletin of Economics and Statistics
Volume
77
Pages
pp. 822–831
Publisher
Blackwell
DOI
http://dx.doi.org/10.1111/obes.12086
ISSN
14680084

Summary

We introduce the (panel) zero-inflated interval regression (ZIIR) model, which is ideally suited when data are in the form of groups, and there is an ‘excess’ of zero observations. We apply our new modelling framework to the analysis of visits to the general practitioner (GP) using individual-level data from the British Household Panel Survey. The ZIIR model simultaneously estimates the probability of visiting the GP and the frequency of visits (defined by given numerical intervals in the data). The results show that different socio-economic factors influence the probability of visiting the GP and the frequency of visits.

Notes

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