TAXATION, AGGREGATE ACTIVITY AND ECONOMIC GROWTH: CROSS-COUNTRY EVIDENCE ON SOME SUPPLY-SIDE HYPOTHESES

Data from sixty‐three countries are used to examine the impact of average and marginal tax rates on the level and growth of economic activity. Apparent negative effects of tax rates on growth disappear upon controlling for (1) potential endogeneity of average tax rates to per capita income and (2) the relation between economic growth and per capita income. However, controlling for average tax rates, increases in marginal tax rates have negative effects on the level of economic activity. This evidence supports the hypothesis that reductions in the “progressivity” of tax rates induce a parallel shift upward in the growth path.