Democracy, Government Spending, and Economic Growth: A Political-Economic Explanation of the Barro-Effect

Abstract

The paper develops a political economicargument for the recently observed inverseu-shaped relation between the level ofdemocracy and economic performance. A modelis constructed that shows why and howpolitical participation influences thespending behavior of opportunisticgovernments that can choose an optimalcombination of rents and public goods toattract political support. If the level ofdemocracy remains comparably low,governments rationally choose rents as aninstrument to assure political support.With increasing democratic participation,however, rents become an increasinglyexpensive instrument while the provision ofpublic goods becomes more and moreefficient in ensuring the incumbentgovernment's survival in power. As a consequence, an increase in democracy tends toraise growth rates of per capita income.However, the beneficial impact of democracyon growth holds true only for moderatedegrees of political participation. If –in semi-democratic countries – politicalparticipation increases further,governments have an incentive toover-invest in the provision of publicgoods. This model allows to derive and testthree hypothesis: Firstly, based on asimple endogenous growth model, weempirically substantiate our hypothesis ofa non-linear, inverse u-shaped relationbetween the level of democracy and growthof per capita income. Secondly, we showthat the impact of government spending oneconomic growth is higher in moredemocratic countries. Thirdly, wedemonstrate that the level of democracy andgovernment share of GDP are correlated in au-shaped manner.