稅率與經濟成長率：再探動態拉弗曲線

本文在內生成長模型中研究動態拉弗曲線效果，其中 (1) 生產性公共支出進入生產函數， (2) 加入休閒進到效用函數， (3) 政府對勞動所得和資本所得徵收扭曲性稅，並發行債券融通轉移支付和生產性公共支出。我們發現： (1) 不論是資本稅或是勞動稅，皆存在動態拉弗曲線效果，其表示減稅能提高經濟成長率； (2) 降低公債產出比例或提高折現因子，會提高經濟成長率，使動態拉弗曲線右移； (3) 折舊率增加會降低成長率，使動態拉弗曲線左移。

關鍵字

動態拉弗曲線；資本稅；勞動稅；內生成長

並列摘要

This paper studies the dynamic Laffer curve effect in an endogenous growth model with (i) productive public expenditure as an input in the production function and (ii) leisure as an additional argument in the utility function and (iii) the government levies a distortionary income tax for labor and capital and issues bonds to finance lump-sum transfers and productive public spending. We show that (i) there exists a dynamic Laffer curve, which means that the effect of cutting the income tax rates for labor or capital will increase the economic growth rate and (ii) reducing the debt-GDP ratio or increasing discount factor will increase the economic growth rate at every labor or capital income tax rate, shifts the dynamic Laffer curve to the right and (iii) increasing depreciation rate will reduce the economic growth rate at every labor or capital income tax rate, shifts the dynamic Laffer curve to the left.

並列關鍵字

Laffer Curve ； Captial Tax ； Labor Tax ； Endogenous Growth

參考文獻

管中閔、印永翔、姚睿、黃朝熙、徐之強、陳宜廷 (2010) .「臺灣動態隨機一般均衡模型建立與政策評估」. 行政院經濟建設委員會98 年度委託研究計劃,台灣經濟計量學會

Google Scholar

Afonso, A. and J. Jalles (2013) ,“Growth and Productivity: The Role of Government Debt,” International Review of Economics and Finance, 25 (C) , 384–407.