AGGLOMERATION EFFECTS AND THE COMPETITION FOR FIRMS
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abstract
A two-region economy consists of a given but different number of immobile workers in
each region, and a given number of mobile firms. Firms create jobs where they locate, but there is
frictional unemployment. Two sorts of agglomeration effects arise: those from economies of scale
in matching, and those from production economies external to the firm. Regions may either be
part of a unitary state in which case all regional policies are decided by the central government,
or they may be part of a federal state in which case some policies are determined by the regional
governments. We characterize the resource allocations in both a unitary and a federal state, and
identify the set of instruments that are required to replicate the social optimum in each state.