Trade openness, tax reform and tax revenue in developing countries

This article investigates empirically whether the effect of tax reform (involving the progressive replacement of trade tax revenue with domestic tax revenue) in developing countries' tax revenue performance (measured by tax revenue‐to‐GDP ratio) depends on the degree of trade openness of these countries. The analysis has used an unbalanced panel data set of 95 developing countries over the period 1981–2015 and the two‐system GMM approach. Results suggest that tax reform is positively and significantly associated with tax revenue performance in developing countries, with the magnitude of this positive effect increasing as countries experience a higher development level. Additionally, and more importantly, countries that further open up their economies to international trade enjoy a higher positive effect of tax reform on tax revenue than countries that experience a lower degree of trade openness. Therefore, these findings should help dissipate the concerns of policymakers in developing countries that greater openness to international trade would further erode their tax revenue, including by lowering their international trade tax revenue. In fact, the implementation of an appropriate tax reform in the context of greater trade openness would generate higher tax revenue, while concurrently allowing countries to reap the well‐known benefits of international trade.