Die Zusammenlegung von Polizeikräften durch die Schließung von Polizeiposten ist ein vielbeobachtetes Phänomen in entwickelten Volkswirtschaften. Polizeiposten stellen einen bedeutenden und sichtbaren Teil der öffentlichen Infrastruktur dar. Als Ergebnis der vorliegenden Studie zeigt sich, dass die Schließung von Polizeiposten zu einem Anstieg von Autodiebstählen und Wohnungseinbrüchen führt. Diese Resultate können nicht durch Verdrängungseffekte in andere Regionen, veränderte Einsatzstrategien der Polizeieinheiten oder eine geringere Inhaftierung von Kriminellen erklärt werden. Vielmehr sind sie konsistent mit einer veränderten Wahrnehmung der Aufklärungswahrscheinlichkeit. Somit zeigt sich, dass die Sichtbarkeit von lokalen Polizeiposten zur Abschreckung und demnach zur Kriminalitätsbekämpfung beiträgt.

Many countries consolidate their police forces by closing down local police stations. Police stations represent an important and visible aspect of the organization of police forces. We provide novel evidence on the effect of centralizing police offices through the closure of local police stations on crime outcomes. Combining matching with a difference-in-differences specification, we find an increase in reported car theft and burglary in residential properties. Our results are consistent with a negative shift in perceived detection risks and are driven by heterogeneous station characteristics. We can rule out alternative explanations such as incapacitation, crime displacement, and changes in police employment or strategies at the regional level. We argue that criminals are less deterred due to a lower visibility of the local police.

Labour market institutions are policy interventions aiming to improve labour market outcomes in terms of employment and wages. However, because labour markets are complex, it is not straight forward whether these policy interventions achieve their objectives. Instead, they may result in the opposite or induce side effects. In this dissertation, the impact of minimum wages and employment protection legislation on employment are studied. The first chapter discusses labour market institutions, focusing on the above mentioned polices. The second chapter analyses the effects of the German minimum-wage introduction on employment. The findings suggest that marginal employment decreased while regular employment increased. The third chapter studies the same policy with respect to a different aspect: The minimum wage attracts labour mobility from low-wage neighbouring countries (the Czech Republic and Poland) in the respective border regions. This inflow of foreign workers does not have a negative effect on native employment. The fourth chapter addresses a shortcoming of existing NK-SAM models that allow embedding employment protection legislation. A proposed extension improves the models’ empirical relevance under a restrictive assumption.

Does the administrative organization of police affect crime? In answering this question, we focus on the reorganization of local police agencies. Specifically, we study the effects police force reallocation via station closures has on local crime. We do this by exploiting a quasi-experiment where a reform substantially reduced the number of police stations. Combining a matching strategy with an event-study design, we find no effects on total theft. Police station closures, however, open up tempting opportunities for criminals in car theft and burglary in residential properties. We can rule out that our effects arise from incapacitation, crime displacement, or changes in employment of local police forces. Our results suggest that criminals are less deterred after police station closures and use the opportunity to steal more costly goods.