税收、收入不平等和内生经济增长

企业家(通过金融中介)从家庭借贷来支撑创新。二者在企业家的努力不为外人所见的情形下双方签订信用合同分享创新带来的垄断利润(即蛋糕)。两个有代表性经济人(企业家和家庭)的存在允许人们在内生经济增长模型里研究收入不平等。本文研究发现,企业家分配份额的增加一开始会提升增长速度,但是过了一定值后会拉低增长速度;而该份额的增加一直拉大企业家和工人间的收入差距。所以降低企业家获得的蛋糕的份额的分配改革可缩小收入差距。提高企业家来自创新的收入的税率将降低他们的努力程度,从而降低增长速度,但是该税率的提高有助于降低收入不平等程度。存款收入的税率提高尽管不会改变企业家的努力程度,但是也会降低经济增长速度,而且不会降低收入不平等(如果工人有一定比例的存款)。对于劳动收入(工人工资)的税率增加会加剧工人和企业家间的收入不平等,但对经济增长速度没有影响。     

收入不平等对经济增长影响的实证研究

采用联立方程分析方法,实证分析了收入不平等对经济增长影响的三种机制,探讨了收入不平等如何通过影响物质资本投资、人力资本投资和居民消费来作用于经济增长。结果表明,从长期看收入不平等的扩大会刺激物质资本投资,但不利于人力资本投资和居民消费增长,收入不平等对经济增长的长期影响为负。因此,从经济发展的角度政府不应容忍收入不平等的过分扩大。     

收入分配不平等与经济增长:回到库兹涅茨假说

本文运用一个政治经济模型,研究在财政支出同时具有生产性和消费性,同时进入总生产函数和代表性个人的效用函数时收入分配不平等对经济增长的影响。本文的分析表明:在经济均衡时,增长率与税率呈倒U型关系。随着税率增加,经济增长率先升后降;在政治均衡时,收入分配越不平等,实际资本税率就越高,因此收入分配不平等与经济增长间存在一定程度的库兹涅茨倒U型关系     

收入增长与不平等对我国贫困的影响

本文运用两组家计调查数据,采用夏普里(Shaley)分解法实证分析了20世纪90年代收入增长和收入分配的变化在我国贫困变动中的作用,并特别考虑了不同贫困线、贫困指标及等价规模对实证结果的影响。分析结果表明,90年代前半期农村减贫的成功主要归因于收入的增长和不平等的下降。在90年代后半期,农村和城市都经历了不平等的快速上升和收入的缓慢增长。因此,这段时间减贫的速度下降,甚至贫困有所增加。     

Public Insurance against Idiosyncratic and Aggregate Risk: The Case of Social Security and Progressive Income Taxation

In this article, I discuss the role a progressive income taxsystem and a redistributive pay as you go (PAYGO) social securitysystem can play in insuring and reallocating idiosyncratic aswell as aggregate risk. I also argue that the underlying sourceof market failures generating such a role for government interventionmay be crucial when determining the normative consequences ofsuch social insurance. (JEL Classifications: E62, H21, H24,H55).     

不同所有制条件下的收入差距问题研究——基于机会不平等理论的视角

经典的马克思主义收入分配理论正在经受当下中国收入差距扩大的事实挑战.文章将机会不平等因素引入马克思主义收入分配理论模型中,利用反事实函数,通过Shapley分解,获得如下新的认识:(1)经典马克思主义收入分配理论与机会不平等理论具有一致性,这是我们进行理论创新的逻辑起点.(2)如果不考虑机会不平等因素,那么经典马克思主义收入分配理论的核心观点是成立的;但事实上,机会不平等对收入分配的影响在不同的所有制条件下都存在.(3)在我国,如果机会不平等对收入分配的负向影响大于公有制对收入分配的正向影响,那么所有制的优势将无法得到有效体现,收入分配差距扩大的趋势也将难以遏制.因此,只有切实地消除或减少各种机会不平等因素,才能充分地发挥公有制在收入分配调节中的优势作用.     

收入税和闲暇时间对中国经济增长的影响

笔者通过构建内生经济增长模型,基于1994年~2012年中国和丹麦的经济数据探讨了收入税、闲暇时间对经济增长的影响。结果显示:收入税和闲暇对经济增长的影响和该国经济发展水平有很大关系。对处于工业化发展中期的中国,收入税和闲暇在一定程度上抑制了经济的增长,而对处于后工业发展阶段的丹麦,较高的收入税水平和闲暇时间对经济增长都起到了一定的促进作用。     

Income Inequality and Economic Growth: Evidence from American Data

While most cross-country studies find a negative relationship between income inequality and economic growth, studies that use panel data suggest the presence of a positive relationship between inequality and growth. This paper uses a cross-state panel for the United States to assess the relationship between inequality and growth. Using both standard fixed effects and GMM estimations, this paper does not find evidence of a positive relationship between inequality and growth but finds some evidence in support of a negative relationship between inequality and growth. The paper, however, shows that the relationship between inequality and growth is not robust and that small differences in the method used to measure inequality can result in large differences in the estimated relationship between inequality and growth.     

Progressive Taxation, Tax Exemption, and Irreversible Investment under Uncertainty

We analyze the impact of progressive taxation on irreversible investment under uncertainty. We show that if tax exemption is lower than sunk cost, higher tax rate will decelerate optimal investment by increasing the optimal investment threshold, while if tax exemption exceeds sunk cost, three different regimes arise. For “small” volatilities the optimal investment threshold is a positive function of volatility, but independent of tax rate. For “medium” volatilities it is independent of both tax rate and volatility. Finally, for “high” volatilities the optimal investment threshold depends positively on volatility, but negatively on tax rate so that we have “tax paradox”.     

Inequality, Growth, and the Dynamics of Social Segmentation

In this paper, we investigate the link between the dynamics of society segmentation into communities and the growth process, based on a simple human capital growth model. Using coalition theory, we study the socioeconomic dynamics of an economy over time, characterize it and prove that the economy converges to a steady state partition that may be segmented. Eventually the whole economy tends to a balanced growth path, exhibiting persistent inequality in the case of segmentation. We then provide sufficient conditions on initial inequality and the technology parameters generating local and global externalities for obtaining a segmented society in the long run. On the whole, the relationship between inequality and growth cannot be assessed without taking into consideration the stratification phenomena at work in society over time.     

Income Inequality is not Harmful for Growth: Theory and Evidence

The paper shows that income inequality may theoretically lead to higher economic growth if public consumption enters the utility function. Empirically, baseline estimations and a sensitivity analysis show that income inequality is positively, and most of the time significantly, associated with economic growth. These findings stand in sharp contrast to the negative association between inequality and growth propounded by Alesina and Rodrik and by Persson and Tabellini.     

Does the Profile of Income Inequality Matter for Economic Growth?

This paper investigates the importance of the shape of the income distribution as a determinant of economic growth in a panel of countries. Using comparable data on disposable income from the Luxembourg Income Study, results suggest that inequality at the top end of the distribution is positively associated with growth, while inequality lower down the distribution is negatively related to subsequent growth. These findings highlight potential limitations of an exploration of the impact of income distribution on growth using a single inequality statistic. Such specifications may capture an average effect of inequality on growth, and mask the underlying complexity of the relationship.     

中国经济增长与收入差距关系的经验研究

经济增长与收入差距的关系是一个古老而又充满活力的问题。研究发现,尽管全国总量时序数据的Granger因果关系检验表明,中国的经济增长与收入差距不存在任何方向的因果关系,但以各省GDP增长率和城乡收入比为观测点的面板数据检验结果显示:不论是在短期还是在长期,收入差距的扩大都是引起经济增长的Granger原因;经济增长在短期会引起收入差距的扩大,但从长期看,有助于收入差距的缩小。     

Oil Abundance and Income Inequality

The paper empirically investigates the impact of natural resource abundance, in particular oil, on income disparities. It employs common correlated effects pooled mean group methodology for estimation to account for the cross-country heterogeneity and cross-section dependence in the oil-inequality nexus. In a sample of developed and developing countries, we find that oil abundance as well as oil dependence reduce income inequality. This inequality-reducing effect is highly likely to operate from better education attainments and improved health status due to oil booms.     

The Marginal Cost of Australian Income Taxation*

When the financing of expenditure programmes involves a welfare cost, that cost should be considered part of the opportunity cost of the expenditure programme. In this paper, we explore some concepts of the welfare loss of taxing labour income. We correct some measures previously applied and estimate the marginal cost of Australian public funds. Using our measure of the cost of public funds, we explore the costs of policy options in the motor vehicle industry.     

收入不平等对经济增长的倒U型影响:理论和实证

文章致力于从理论和实证两个维度,探讨收入不平等对长期经济增长"先促进后阻碍"的"倒U型"影响.文章首先基于一个拉姆齐模型,从理论上证明这一"倒U型"关系的存在;其次是构建实证模型,根据跨国横截面数据,分别运用OLS和GMM估计方法从实证的角度检验这一"倒U型"关系的存在.实证结果显示:GMM估计方法要优于OLS估计方法,在其他条件不变情况下,收入不平等有一个合理区间,如果以基尼系数衡量不平等程度,这一数值处于0.37-0.40之间.当一国初始收入不平等程度低于最优值时,可以通过提高收入不平等程度来加快经济增长的速度;反之,则应通过降低收入不平等程度来促进经济的增长.     

论我国个人所得税制改革

本文以我国个人所得税的收入功能和分配功能为分析基点,详细分析了现行个人所得税的税制缺陷,并从纳税主体、税制模式、费用扣除标准和税率设计等要素出发,总结出我国下一轮税制改革中个人所得税的改革方向。同时指出,个人所得税两大功能的发挥还有赖于其他相关制度的建立和完善。     

Income Inequality and Technological Adoption

We relate technological adoption (of different technologies) with income inequality. In the process, we discover that some technologies, such as aviation, cell phones, electric production, internet, telephone, and TV, are skill-complementary in raising inequality. We construct standardized indexes of skill-complementary technological adoption for modern information and communication technologies (ICT), older ICT, production and transport technologies. We find strong evidence that older ICT and transport technologies (and less frequently modern ICT) tend to increase inequality. Additionally, we discover that results are much stronger in rich countries than in poor ones. Our results are quite robust to a series of changes in specifications, estimators, samples, and measurement of technology adoption. These results may bring insights into the design of incentive schemes for technology adoption.