In addition to participating in elections, citizens in Germany have numerous additional forms of participation available to influence the political system and its decisions. These include participation in demonstrations, involvement in citizen initiatives, donating money to political parties, or boycotting products for political reasons. This volume examines the frequency, structure, and explanatory factors of these political activities. The use of trend and panel data allows for a comprehensive analysis of the political participation process and provides, for the first time, an analysis of intra-individual changes in political activities and their causal explanation patterns in Germany.