Formal and Real Power in General Equilibrium

Hans Gersbach and Hans Haller ()
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Hans Haller: Virginia Polytechnic Institute

No 15/212, CER-ETH Economics working paper series from CER-ETH - Center of Economic Research (CER-ETH) at ETH Zurich

Abstract: We integrate individual power in groups into general equilibrium models with endogenous group formation. We distinguish between formal power (the say in group decisions) and real power (utility gain from being in groups). Their values will be determined as part of the equilibrium. We find that higher formal power does not necessarily translate into higher equilibrium utility or higher real power. One reason is that induced price changes may offset the groupmember’s increased influence. A second reason is that the group may dissolve when a group member gains too much influence, because other members can exercise the option to leave. We also show that maximal real power can be compatible with Pareto efficiency. We further identify circumstances when changes of formal power in one group do not impact on other groups. Finally, we establish existence of competitive equilibria, including equilibria where some individual enjoys real power.

Keywords: Group formation; competitive markets; power; exit (search for similar items in EconPapers)
JEL-codes: D41 D50 D60 (search for similar items in EconPapers)
Pages: 37 pages
Date: 2015-03
New Economics Papers: this item is included in nep-cdm, nep-mic and nep-upt
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