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faculty: "FEB" and publication year: "2009"
| Author||H. van Ophem|
|Title||The frequency of visiting a doctor: is the decision to go independent of the frequency?|
|Publisher||Faculteit Economie en Bedrijfskunde|
|Title series||UvA-Econometrics Discussion Paper|
|Faculty||Faculty of Economics and Business|
|Institute/dept.||FEB: Amsterdam School of Economics Research Institute (ASE-RI)|
|Abstract||In his analysis of the effects of the reform of the German healthcare system, Winkelmann|
(2004) investigates the number of doctor visits. He makes a distinction between the decision to go to a physician and the number of times the physician is visited in the observed time period. Winkelmann finds that there is no correlation between both decisions. This results appears to be far from straightforward since the primary driving force in both decision will be the health of the patient. From this perspective a significant correlation is expected. In this paper it is analysed whether the apparent zero correlation is actually true or comes from the way the relation between both decisions is modelled. My empirical analysis confirms the latter, but nevertheless also corroborates Winkelmann's main conclusions on the relevance of the explanatory variables used in his investigation.
JEL: I11, C35.
Keywords: count models, hurdle-Poisson specification, copulas, correlation.
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