Dealing with correlated choices: How a spin-glass model can help   political parties select their policies
  Starting from preferences on N proposed policies obtained via questionnaires from a sample of the electorate, an Ising spin-glass model in a field can be constructed from which a political party could find the subset of the proposed policies which would maximize its appeal, form a coherent choice in the eyes of the electorate, and have maximum overlap with the party's existing policies. We illustrate the application of the procedure by simulations of a spin glass in a random field on scale-free networks. 
M. A. Moore and Helmut G. Katzgraber
cond-mat.dis-nn physics.soc-ph