Download password can be obtained from Mason Porter or Peter Mucha

The readme for this data is below:

The file here contains a processed version of the roll call voting matrices for the 102nd-107th Houses of Representatives. (The unprocessed version of the data is available at Keith Poole's voteview website.

The processed version of the data was analyzed in the following papers. Please cite one or both of them in any paper that uses this processed version of the data. (If citing only one of them, it should probably be the PNAS article.)


  author =       {Porter, Mason A. and Mucha, Peter J. and Newman, {M.~E.~J.} and Warmbrand, Casey M.},
  title =        {A network analysis of committees in the {U}nited {S}tates {H}ouse of {R}epresentatives},
  journal =      {Proceeings of the National Academy of Sciences},
  year =         2005,
  volume =       {102},
  number =       {20},
  pages =        {7057-7062}


  author =       {Porter, Mason A. and Mucha, Peter J. and Newman, {M.~E.~J.} and Friend, A. J.}, 
  title =        {Community Structure in the {U}nited {S}tates {H}ouse of {R}epresentatives},
  year =         2006,
  volume =       {physics/0602033}


The matrices are labeled according to the Congress in question. A +1 means a 'yeah' vote, a -1 means a 'nay' vote, and 0 means either absence or absention. (These two are distinguished in Keith Poole's version of the data.)

Note that these voting matrices include people who left or entered office mid-term. (That's why there may seem to be more Representatives in the matrix than one might expect. This also explains long strings of 0s.)