Policy evaluation studies, which assess the effect of an intervention, face statistical challenges: in real-world settings treatments are not randomly assigned and the analysis might be complicated by the presence of interference among units. Researchers have started to develop methods that allow to manage spillovers in observational studies;…

This article presents a story of how an American teacher in Berlin tried to reach out to her Muslim high school students. She relates how her students were always gracious to her but when they found out she was an American, they tend to avoid talking to her. She explains that the reputation the United States has earned over the past three years…

Extending research on age norms in adults, the development of the knowledge of two components of the cultural concept of biography, biographical salience of and age norms for life events was studied from late childhood to early adulthood in Study 1 and across adulthood in Study 2. The largest increase in knowledge was found between ages 8 and 12,…

Reports on a study of adolescent students' opinions concerning environmental issues. Students from rural and urban areas in England and Germany answered questionnaires covering environmental issues, their individual lifestyles. Questionnaires included free writing sections. Attempts to understand the students'"umweltbewusstsein" (the…