Lübbert, Daniel Negative Vote Weights in the German Federal Election 2009.</b In July 2008 the German electoral law was declared unconstitutional by the German Federal Constitutional Court because it could violate the principles of direct and equal elections. Not much time is left until June 2011, the date by which the legislature needs to have amended this law in such a way as to eliminate the effect of negative vote weights. In order to support the related debate and to substantiate it with quantitative data, it is shown where and to which extent negative vote weights occurred again in the 2009 election. To assess possible consequences of electoral reform calculations are conducted for the most important proposals in the current debate how they would have changed the actual seat apportionment in the 17th German Bundestag if they had been enacted before September 2009. Lübbert, Daniel Negative Vote Weights in the German Federal Election 2009.</b In July 2008 the German electoral law was declared unconstitutional by the German Federal Constitutional Court because it could violate the principles of direct and equal elections. Not much time is left until June 2011, the date by which the legislature needs to have amended this law in such a way as to eliminate the effect of negative vote weights. In order to support the related debate and to substantiate it with quantitative data, it is shown where and to which extent negative vote weights occurred again in the 2009 election. To assess possible consequences of electoral reform calculations are conducted for the most important proposals in the current debate how they would have changed the actual seat apportionment in the 17th German Bundestag if they had been enacted before September 2009. Fachleute aus Wissenschaft und Praxis analysieren und dokumentieren in der interdisziplinären Zeitschrift für Parlamentsfragen – ZParl präzise und verständlich das politische Geschehen in den Parlamenten, Parteien und Institutionen der Bundesrepublik Deutschland und anderer Länder. Auf über 900 Seiten pro Jahr liefert die Zeitschrift nicht nur entscheidendes Hintergrundwissen, sondern zudem in ihrer Gesamtheit eine politische Chronik Deutschlands. Die Zeitschrift richtet sich an Politik- und Rechtswissenschaftler, Historiker und Soziologen.