The following articles use game theory and other formal theory models:
Lacy, Dean, and Emerson M.S. Niou. 2013. Nonseparable Preferences and Issue Packaging in Elections. In Schofield, Norman, Gonzalo Caballero, and Daniel Kselman, eds., Advances in Political Economy: Institutions, Modeling, and Empirical Analysis. Berlin: Springer-Verlag.
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Lacy, Dean, and Emerson Niou. 1998. Elections in Double-Member Districts with Nonseparable Voter Preferences. Journal of Theoretical Politics.