This study was accepted as a doctoral thesis by the Department of E- nomics of the Johann
Wolfgang Goethe-University in Frankfurt Main. It was undertaken within the research project The
E?ects of Job Creation and Structural Adjustment Schemes on the Participating Individuals
which was conducted by the Institute of Statistics and Econometrics (Empirical E- nomic
Research) in cooperation with the Institute for Employment Research in Nuremberg. I have to
thank numerous people. First of all my thesis supervisor Prof. Dr. Reinhard Hujer for
initiating this thesis and providing me with a great scienti?c environment. I owe the data I
used to his persistent lobbying to promote and anchor evaluation research in Germany. I am also
very grateful to Prof. Dr. Roland Eisen who did not hesitate to act as the second thesis
supervisor. Thanks also to Christian Brinkmann and his team at the Institute for Employment
Research (Institut fur Arbeitsmarkt- und Berufsforschung) for valuable help with the datasets.
Ihavealsobene?tedfromcontinualdiscussionswithmycolleaguesStephan L.(!)Thomsen DubravkoRadic
PauloRodrigues SandraVuleticandChris- pher Zeiss. A warm thanks goes also to Birgit Kreiner and
all our current and former student research assistants.
