Summary This paper deals with the demonstration in Leipzig on October 9, 1989, an important episode in the history of the East German Revolution. It is generally held that 70,000 demonstrators participated. This paper shows that this number is clearly wrong. The paper describes briefly the...

This article addresses three largely unsolved problems in theory and research on political protest. The first problem concerns feedback effects. The common assumption is that protest is determined by various factors and does not influence its determinants. We propose and test hypotheses about...

This article addresses major arguments in the controversy about the “rationality” of moral behavior: can moral behavior be explained by rational choice theory (RCT)? The two positions discussed are the incentives thesis (norms are incentives as any other costs and benefits) and the autonomy...