This paper empirically analyzes the effect of the inclusion of German corporations in the Dow Jones STOXX Sustainability Index (DJSI STOXX) and the Dow Jones Sustainability World Index (DJSI World) on stock performance. In order to receive robust estimation results, we apply an (short-term)...

It has often been observed in experimental studies that the reliability of items increases if the same questions are asked of the same respondents more than once. This phenomenon, called the “Socratic effect,†also occurs in nonexperimental, short-wave panel studies. In the first...

This article deals with the assessment of the reliability and stability of the respondent's attitudes toward guestworkers across selected standard demographic variables (i.e., age, education, gender) as well as across contacts with guestworkers. As a baseline model we use the “bestâ€...