Monthly Archives: January 2011

Wrapping up the 111th Congress

There were 1,647 roll calls in the 111th House. Of the 1,647 roll call votes, 949 had at least 2.5% of members in the minority, and thus were scalable. A total of 447 members served in the 111th House. This … Continue reading

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Basic Space Issue Scaling Example: Presidential Candidate Positions on Vietnam (1968)

Below we show our first example from our forthcoming Basic Space Scaling package for R. The package includes both the Aldrich and McKelvey scaling method as well as the basic space methods developed by Poole. We apply our package to … Continue reading

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Polarization (updated with 111th Congress data)

Below is a plot of the level of polarization between the two parties in Congress from the 46th Congress (1879-1880) to the most recently adjourned 111th Congress (2009-2010). We measure polarization as the distance between both parties’ first dimension DW-NOMINATE … Continue reading

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Polarization and Policy Swings

Below are two sets of plots which track the House and Senate means of chamber ideology and winning coalitions from 1879-2010. In the chamber mean and mean winning coordinate plots, we find greater volatility when the mean winning coordinate deviates … Continue reading

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