The role of tax bases and collections costs in the determination of income tax rates, seigniorage and inflation

A growing theoretical literature on optimal taxation predicts that governments will set the tax rates on money holdings and on more traditional tax bases to minimize the deadweight losses of collecting government revenue. Under the presumption that relative collection costs and tax bases have not changed significantly over time, the empirical time-series seigniorage literature has focused on the theory's tax smoothing implication, finding only weak support. We show that changes in collections costs and tax bases played an important role in the determination of tax composition and find stronger support for tax smoothing when this is taken into account.