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Coalition Formation in Legislative Bargaining

Marco Battaglini ()

No 25664, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: We propose a new model of legislative bargaining in which coalitions have different values, reflecting the fact that the policies they can pursue are constrained by the identity of the coalition members. In the model, a formateur picks a coalition and negotiates for the allocation of the surplus it is expected to generate. The formateur is free to change coalitions to seek better deals with other coalitions, but she may lose her status if bargaining breaks down, in which case a new formateur is chosen. We show that as the delay between offers goes to zero, the equilibrium allocation converges to a generalized version of a Nash Bargaining Solution in which —in contrast to the standard solution— the coalition is endogenous and determined by the relative coalitional values. A form of the hold-up problem specific to these bargaining games may lead to significant inefficiencies in the selection of the equilibrium coalition. We use the equilibrium characterization of the distortions to study the role of the head of state in avoiding (or containing) distortions. We also show that the model helps rationalizing well known empirical facts that are in conflict with the predictions of standard non-cooperative models of bargaining: the absence of significant (or even positive) premia in ministerial allocations for formateurs and their parties; the occurrence of supermajorities; and delays in reaching agreements.

JEL-codes: D72 D78 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-cdm and nep-gth
Date: 2019-03
Note: POL
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