법인세율과 개방도의 변화가 법인세수에 미치는 영향에 대한 실증분석 : Laffer curve를 이용하여

This paper examines the effect on corporate tax revenue from changes of corporate tax rate and openness using Laffer curve in OECD countries over the time period 1981-2009. Corporate tax rates among OECD countries have been declining steadily while corporate tax revenue increasing speedly. This is because the change of socioeconomic such as increasing the amount of trade in GDP, decreasing unemployment rate. Moreover, OECD countries are achieving a high level of economic growth since mid 1980s To consider this variation, first hypothesis is the relation between corporate tax and revenue and explore optimal tax rate in Laffer curve. Second hypothesis is the empirical analysis what the relation between corporate tax revenue and tax rate can be changed by economic growth and openness. Empirical results indicate a strong statistical evidence of Laffer curve between tax rates and revenues similar to Clausing(2007), implying a revenue maximizing corporate tax rate of 30% for the whole sample. According to analysis, it is a positive relationship between corporate tax rate and revenue. however this relation is becoming weak as the economy grew and the amount of trade in GDP increased. Also, it is found that the optimal tax rate on Laffer curve is down and a slope is steeper. As long as time goes, economies are integrated with the world and this phenomenon on this paper would be last. Consequently, it draw a policy implication that the tax policy selected by OECD countries what cut the corporate tax rate according to economic growth and increasing openness seems to be desirable.