Legislative Capacity in Germany's Parliaments

We present new data on the legislative capacity (or professionalism) of Germany's national and subnational parliaments including legislator salary, informational expenditures, and counts of committee and plenary sessions. We describe these data and aggregate them into a summary measure modeled after the Squire Index as well as a measure derived from factor analytic decomposition. The internal validity of these measures is assessed in a case study of recent parliamentary reforms in Baden‐Württemberg and the external validity is assessed via comparison to electoral turnover. We conclude with suggestions for future research and hope that our colleagues will both make use of these data to study the causes and consequences of legislative capacity in Germany and also be motivated to collect and disseminate similar data for new contexts.