Assessing the impact of initial nonresponse and attrition in the analysis of unemployment duration with panel surveys |
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Authors: | Marjo Pyy-Martikainen Ulrich Rendtel |
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Institution: | 1. Department of Economics and Statistics, ?bo Akademi University and Statistics Finland, 00022, Statistics, Finland 2. Institute of Statistics and Econometrics, Freie Universit?t Berlin, Gary Str. 21, 14195, Berlin, Germany
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Abstract: | We show how register data combined at person-level with survey data can be used to conduct a novel type of nonresponse analysis
in a panel survey. The availability of register data provides a unique opportunity to directly test the type of the missingness
mechanism as well as estimate the size of bias due to initial nonresponse and attrition. We are also able to study in-depth
the determinants of initial nonresponse and attrition. We use the Finnish subset of the European Community Household Panel
(FI ECHP) data combined with register panel data and unemployment spells as outcome variables of interest. Our results show
that initial nonresponse and attrition are clearly different processes driven by different background variables. Both the
initial nonresponse and attrition mechanisms are nonignorable with respect to analysis of unemployment spells. Finally, our
results suggest that initial nonresponse may play a role at least as important as attrition in causing bias. This result challenges
the common view of attrition being the main threat to the value of panel data. |
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Keywords: | Combined survey-register data Nonresponse analysis Duration of unemployment |
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