Notes and Comments : Selection Effects in Roll Call Votes

Roll call votes in parliaments may yield important insights into various aspects of political systems. They may inform us on the apparent conflict lines in parliaments,1 the cohesion2 of party groups,3 the representativeness of members of parliaments (MPs),4 etc. Thus, it is not surprising that studies using roll call votes from parliaments at the national and supranational level have become more frequent.5