Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/178318 
Authors: 
Year of Publication: 
2014
Citation: 
[Journal:] Journal for Labour Market Research [ISSN:] 2510-5027 [Volume:] 47 [Issue:] 1-2 [Publisher:] Springer [Place:] Heidelberg [Year:] 2014 [Pages:] 43-62
Publisher: 
Springer, Heidelberg
Abstract: 
This paper discusses methodological problems of standard errors and treatment effects. First, heteroskedasticity- and cluster-robust estimates are considered as well as problems with Bernoulli distributed regressors, outliers and partially identified parameters. Second, procedures to determine treatment effects are analyzed. Four principles are in the focus: difference-in-differences estimators, matching procedures, treatment effects in quantile regression analysis and regression discontinuity approaches. These methods are applied to Cobb-Douglas functions using IAB establishment panel data. Different heteroskedasticity-consistent procedures lead to similar results of standard errors. Cluster-robust estimates show evident deviates. Dummies with a mean near 0.5 have a smaller variance of the coefficient estimates than others. Not all outliers have a strong influence on significance. New methods to handle the problem of partially identified parameters lead to more efficient estimates. The four discussed treatment procedures are applied to the question whether company-level pacts affect the output. In contrast to unconditional difference-in-differences and to estimates without matching the company-level effect is positive but insignificant if conditional difference-in-differences, nearest-neighbor or Mahalanobis metric matching is applied. The latter result has to be specified under quantile treatment effects analysis. The higher the quantile the higher is the positive company-level pact effect and there is a tendency from insignificant to significant effects. A sharp regression discontinuity analysis shows a structural break at a probability of 0.5 that a company-level pact exists. No specific effect of the Great Recession can be detected. Fuzzy regression discontinuity estimates reveal that the company-level pact effect is significantly lower in East than in West Germany.
Subjects: 
empirische Forschung
Wirtschaftsforschung
Fehler
Forschungsmethode
Kausalanalyse
Schätzung
Regressionsanalyse
IAB-Betriebspanel
Arbeitsmarktforschung
Bündnis für Arbeit - Auswirkungen
Rezession
Westdeutschland
Ostdeutschland
Bundesrepublik Deutschland
JEL: 
C21
C26
D22
J53
Persistent Identifier of the first edition: 
Document Type: 
Article

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