最適財政政策與經濟成長：不完全競爭模型

The Optimal Fiscal Policies and Economic Growth in an Imperfect Competition Model

10.6277/TER.2016.444.3

王韋能(Wei-Neng Wang)；謝智源(Jhy-Yuan Shieh)

不完全競爭 ； 經濟成長 ； 財政政策 ； imperfect competition ； economic growth ； fiscal policies

經濟論文叢刊

44卷4期（2016 / 12 / 01）

611 - 639

繁體中文

本文建構一個包含生產性政府支出與不完全競爭特性市場結構的內生成長模型，據此討論所得稅對經濟成長與社會福利的影響，同時也分析最適政府支出組合。根據本文的研究發現，(1) 政府以所得稅融通生產性政府支出時,所得稅提高對經濟成長與社會福利的影響均不確定。(2) 經濟社會存在一個同時滿足經濟成長極大與社會福利極大的最適所得稅率水準,而且最適所得稅率高於政府支出的產出彈性。(3) 政府提高具有排他性的公共服務支出對於經濟成長與社會福利的影響均不確定。(4) 經濟社會存在一個滿足同時滿足經濟成長率極大與社會福利極大的最適政府支出組合水準。

In this paper, we analyze the effects of the income tax rate on economicgrowth and social welfare in an imperfect competition growth model. Wefind that, the growth-maximization tax rate is increasing with the degree ofsectoral externalities and the extent of the returns from specialization, butindependent of monopoly power. In addition, maximizing the economicgrowth rate is equivalent to maximizing social welfare. An increase in the excludablepublic service expenditure has an ambiguous impact on the growthrate and social welfare. Furthermore, we can find the optimal compositionof excludable government expenditure.

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