Martin E. Hansen, Marc Debus
The Behaviour of Political Parties and MPs in the Parliaments of the Weimar Republic

Party Politics, 2012: 18, issue 5 , pp. 709-726

Analysing the roll call votes of the MPs of the Weimar republic we find that 1) party competition in the Weimar parliaments can be structured on two dimensions: a left-right and a pro-/antidemocratic dimension. Remarkably, this is stable throughout the entire lifespan of the Republic and not only in the later years and despite the varying content of the votes across the lifespan of the Republic 2) that the nearly all parties were troubled by intra-party divisions, though especially the national socialists and the communists became homogenous in the last years of the Republic.