PrefaceThe present publication results from the research project "Development and validation of scientific indicators of the relationship between criminality, social cohesion and economic performance" which has been commissioned and financed by the European Commission, Directorate-General Employment and Social Affairs. The results obtained within the framework of the project do not necessarily represent the opinion of the European Commission nor can the Commission be held responsible for the contents of the study. The aim of launching the research project was to contribute to a better understanding of the interactions between criminality, economic performance, social cohesion and the socio-economic situation of the population. We have tried to achieve this aim by employing adequate multivariate statistical methods to European data from different levels of regional disaggregation. When interpreting our empirical results, it has to be taken into account that the estimated coefficients of some variables might be affected by the use our regional data set. Since the Commission was primarily interested in the use of replicable official data, no individual survey data have been collected. Thus, some results might suffer from unobservable heterogeneity or the omission of relevant (but unavailable) variables. In the project report as well as in the present paper, we have made all potential results of this nature quite clear by hinting at these problems (see, for instance, the interpretation of crimes committed by "foreigners"). In spite of the fact that empirical investigations are performed with great care, it seems advisable to make this note of caution, because otherwise superficial reading might lead to potential misinterpretations. Moreover, it might be important to note that channels of influence are crime-specific. This implies that for types of crime which are not subject of our study, as, for instance, white-collar and organised crime, no conclusions can be drawn. We want to thank Dr. Ernst-Heinrich Ahlf, Hedwig Risch and Franz Rohrer from the German Federal Criminal Police Office for their valuable support in the data acquisition. We are especially indebted to Gordon Barclay, Gabriella Bremberg and Tove Sporre, Francisco Javier Cirujano González, Gerad de Coninck, Antonio D'Acunto, Frits Huls, A.P. J∅rgensen, Jorma Kallio and Risto Lättilä, Sílvia Pedrosa and Nikolaos Tassiopoulos for the supply of regional crime data from their respective countries. Without their kind co-operation an adequate realisation of the project would not have been achieved. Of course, the same applies to our correspondents in the 16 German State Criminal Police Offices. We are also grateful to Hans-Jörg Albrecht, Joanna Shapland, Dieter Dölling, Erling Eide, Thomas Feltes, Jeffrey Grogger, Henner Hess, Susanne Karstedt, Hans-Jürgen Kerner. Steven Levitt, Detlev Nogala, Thomas Ohlemacher, Christian Pfeiffer, Hans-Bernd Schäfer, Robert J. Sampson and Michael Willis for their valuable hints and help concerning the literature relevant for ...