Modelling Heaping Effects in Unemployment Duration Models – With an Application to Retrospective Event Data in the German Socio- Economic Panel / Ökonometrische Modellierung von „Heaping“-Effekten in Verweildauermodellen der Arbeitslosigkeit auf der Basis der retrospektiven Kalendariendaten des Sozio-ökonomischen Panels für Deutschland

Kraus Florian and Steiner Viktor
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Kraus Florian: ZEW (Zentrum für Europäische Wirtschaftsforschung), Postfach 104334, D-68034 Mannheim
Steiner Viktor: ZEW (Zentrum für Europäische Wirtschaftsforschung), Postfach 104334, D-68034 Mannheim

Journal of Economics and Statistics (Jahrbuecher fuer Nationaloekonomie und Statistik), 1998, vol. 217, issue 5, 550-573

Abstract: Duration data derived from retrospective surveys often show an abnormal concentration of responses at certain durations. This common kind of measurement error is known as “heaping” in the statistical literature. We show how heaping effects can be modelled within a maximum likelihood framework using external validation information and demonstrate how parameter estimates in discrete-time proportional hazard models are affected by alternative specifications of the heaping mechanism. The model is applied to unemployment duration data derived from the retrospective calendar information in the German Socio-Economic Panel. Our main result is that parameter estimates are generally rather insensitive to whether or not heaping is explicitly taken into account and to different assumptions about the heaping mechanism.

Keywords: Unemployment duration models; retrospective survey data; heaping effects; Abgangsratenmodelle der Arbeitslosigkeitsdauer; Befragungsdaten; Meßfehler (search for similar items in EconPapers)
Date: 1998
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Persistent link: https://EconPapers.repec.org/RePEc:jns:jbstat:v:217:y:1998:i:5:p:550-573

DOI: 10.1515/jbnst-1998-0503

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