In this paper we argue that spatial voting games and power index models are not necessarily exclusive ways to analyse EU decision-making. We find that the two main criticisms pointed out by scholars of spatial voting games, namely that power indices do not take into account preferences or the role of the agenda-setter, are not fully valid as spatial voting games deal with complete whereas power indices deal with incomplete contracts. Ideas for combining the two so far very opposite views are then discussed.
Barry, B.
(1980) `Is it Better to be Powerful than Lucky I and II', Political Studies28: 183-194; 338-352.
2.
Garrett, G.
and G. Tsebelis (1999) `Why Resist the Temptation to Apply Power Indices to the European Union?', Journal of Theoretical Politics11(3): 291-308.
3.
Gul, F.
(1989) `Bargaining Foundations of Shapley Value', Econometrica57: 81-95.
4.
Hart, O.
and J. Moore (1990) `Property Rights and the Nature of the Firm', Journal of Political Economy98: 1119-1158.
5.
Hart, O.
and J. Moore (1998) `Foundations of Incomplete Contracts', Review of Economic Studies66: 115-138.
6.
Hart, S.
and A. MasColell (1996) `Bargaining and Value', Econometrica64: 357-380.
7.
Kirman, A.
and M. Widgrén (1995) `European Economic Decision Making: A Progress or Paralysis', Economic Policy21: 421-460.
8.
Laruelle, A.
and M. Widgrén (1998) `Is the Allocation of Power among EU States Fair?', Public Choice94 (3/4): 317-339.
9.
Laruelle, A.
and M. Widgrén (1999) `Voting Power in a Sequence of Cooperative Games: The Case of EU Procedures', forthcoming in M. Holler and G. Owen (eds) Power Indices and Coalition Formation.
10.
Shapley, L.
(1953) `A Value for n-person Games', in H. Kuhn and A. Tucker (eds) Contributions to the Theory of Games, Vol. 2. Princeton, NJ: Princeton University Press.
11.
Straffin, P.
(1988) `The Shapley-Shubik and Banzhaf Power Indices as Probabilities', in A. E. Roth (ed.) The Shapley Value, Essays in Honor of Lloyd Shapley. Cambridge: Cambridge University Press.
12.
Widgrén, M.
(1995) `Probabilistic Voting Power in the EU Council: The Cases of Trade Policy and Social Regulation', Scandinavian Journal of Economics97(2): 345-356.