A zero-inflated regression model for grouped data
JournalOxford Bulletin of Economics and Statistics
AuthorsSarah Brown, Alan Duncan, Mark Harris, Jennifer Roberts, Karl Taylor
PublishedDecember 2015
PublisherWileys Online Publication
DOI10.1111/obes.12086
ISBN0305–9049
Number of Pages822-831
Volume 77:6
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.
The Bankwest Curtin Economics Centre team acknowledges the Wadjuk Nyungar people as the traditional owners of the land on which the Centre is situated.