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We inspect a possible clustering structure of the corruption perception among 134 countries. Using the average linkage clustering, we uncover a well-defined hierarchy in the relationships among countries. Four main clusters are identified and they suggest that countries worldwide can be quite well separated according to their perception of corruption. Moreover, we find a strong connection between corruption levels and a stage of development inside the clusters. The ranking of countries according to their corruption perfectly copies the ranking according to the economic performance measured by the gross domestic product per capita of the member states. To the best of our knowledge, this study is the first one to present an application of hierarchical and clustering methods to the specific case of corruption.

Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Recent studies emphasize the importance of socio-emotional skills for the success in school as well as for later economic outcomes. However, little is known how practices used by teachers everyday in classrooms impact socio-emotional skills. We show that modern practices such as working in small groups improve them. Especially intrinsic motivation and self-confidence are positively affected. Moreover, modern practices have no adverse effects on test scores. Standard practices such as lecturing or memorizing have no impact on socio-emotional skills. Splitting the sample reveals detrimental effects of standard practices on socioemotional outcomes of boys and positive for high-achieving girls. On the contrary, both genders gain similarly from modern practices. Terms of use: Documents in

Recent studies emphasize the importance of socio-emotional skills for the success in school as well as for later economic outcomes. However, little is known about how everyday classroom practices impact development of these skills. Using data from the Czech Republic, we show that modern practices such as working in small groups improve these skills. Intrinsic motivation and self-confidence are particularly positively affected. Moreover, modern practices have no adverse effects on test scores. On the other hand, standard practices such as lecturing or requiring memorizing have no impact on socio-emotional skills and test scores. Our results highlight that test score measures do not capture all skills developed in schools and suggest that changing slightly the composition of teaching practices can have a substantial positive impact on socio-emotional skills.

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