收入不平等对经济增长的负面影响机制——近二十年文献综述

近年来,国内外学者运用各种方法探讨了收入不平等与经济增长的关系。大部分研究结论显示,收入差距对经济增长存在间接的负面影响,两者之间存在一个多因素的传导过程,包括人力资本积累机制、政治经济决策机制、社会冲突机制、需求传导机制以及其他传导机制。总的来看,这些研究加深了对于两者关系性质和相互影响的认识,但研究结论的分歧和研究方法的局限性仍然存在,有必要对两者关系进行更深入的研究。     

The income inequality,financial depth and economic growth nexus in China

Income inequality has increased in China despite rapid economic growth. Income inequality could impinge on future development, leading to social tension or political instability. Our study investigates the short-run and long-run relationship between three important macroeconomic indicators—income inequality, economic growth and financial depth. We utilise a two-step procedure of ARDL bounds and Granger causality for the analysis. The bounds test indicates the presence of a cointegrating relationship between income inequality, financial depth and economic growth in the long run. In the second step, we utilise the Granger causality approach. Results show a bidirectional causality between financial depth-growth and a unidirectional causality between inequality-growth in the short run. In the long run, results reveal that growth and financial depth determine Gini. Our findings provide support for the inequality-widening effect due to economic growth and higher credit provided to the private sector. We find no evidence of inequality-narrowing or income-equalising effect in the long run for the period of study. It is possible that the government's inclusive growth policies which started less than a decade ago have not taken effect for us to capture the inverted U-shape income equalising effect significantly.     

公共投资与经济增长的相关分析--中国数据的计量检验

本文在现有文献研究的基础上,依据中国改革开放20多年的实际数据,运用内生增长理论构建计量经济模型,对公共物质资本投资、公共人力资本投资及R&D投资与经济增长的相关性进行了协整检验和格兰杰因果关系检验,结果发现:三种公共投资具有不同程度的正向经济增长效应,并且其促进经济增长的路径也不相同.公共物质资本投资主要是通过资本积累效应拉动经济增长,而公共人力资本投资及研发投资则是通过提高全要素生产率及外部性效应促进经济增长.并且,在不同的发展阶段上,三种公共投资与经济增长的因果关系及驱动机制又有所不同.针对实证结果得出结论及政策建议,进而为优化我国公共投资政策提供决策依据.     

The ‘amelioration’ of child labor, ‘a modest proposal’

More than 317 million children between the age of 5 and 17 are working in the world. Child labor is a persistent phenomenon, even though its incidence has subsided with economic development. In this paper, we conduct a panel study of 101 countries from 1980 to 2004 where child labor is proxied by the labor force participation of children aged 10–14. We look at the relationships between child labor and investments in human capital, foreign direct investments, countries’ openness to trade, and credit market constraints. We depart from the contributions of cross-country studies by employing a fixed effects instrumental variable (FE-IV) panel data model by employing a fixed effects instrumental variable (FE-IV) panel data model to account for unobserved heterogeneity and endogeneity of child labor and individual country-specific effects. We find support for the conclusions of the above-mentioned studies: countries that trade more and have a higher stock of foreign direct investment have less child labor. More generally, we find that trade openness, investments in human capital, and financial development are associated with a reduction of child labor. Child labor persists but tailored policies on trade, investment, and financial reform can lessen child labor along with economic growth, improvements in health, and rising standards of living.     

Distributional Effects of Public Investment when Wealth and Classes are Back

In developed economies, wealth inequality is high, while public capital is underprovided. Here, we study the impact of heterogeneity in saving behavior and income sources on the distributional effects of public investment. A capital tax is levied to finance productive public capital in an economy with two types of households: high income households who save dynastically and middle income households who save for retirement. We find that inequality is reduced the higher the capital tax rate is and that low tax rates are Pareto‐improving. There is no clear‐cut trade‐off between efficiency and equality: middle income households’ consumption is maximal at a capital tax rate that is higher than the rate which maximizes high income households’ consumption.     

SIZE AND COMPOSITION OF PUBLIC SPENDING IN A NEOCLASSICAL GROWTH MODEL

This paper analyses the effect of public expenditures in a modified Solow model of capital accumulation with optimizing agents. The model identifies optimal government size and composition of public expenditures which maximize the rate of growth in the dynamics to the steady state and the long‐run level of per capita income. Different allocations of public resources lead to different growth rates in the transitional dynamics depending on their elasticities. However effects from fiscal policy are only temporary. Finally we argue that neglecting the non‐linear nature of the relationship between government spending and growth may lead empirical studies to biased results.     

资本回报率、人力资本投资与收入不平等——基于Galor-Zeira模型的扩展

资本回报率下降对人力资本投资、收入不平等程度有较大影响。本文将可变资本回报率加入Galor-Zeira模型,理论推导发现:收入不平等陷阱并非不可逾越的障碍。当技能劳动力工资高于受教育固定成本时,随着资本回报率下降,接受教育的遗赠临界水平将降低,更多家庭将发现投资人力资本是有利的,稳态的技能劳动力比例将提高。在当前资本回报率下降的大背景下,提高技能劳动力工资、降低受教育成本、对教育贷款实施财政减免优惠、为农村中等教育支出减负和提升农村教育质量、倡导节俭和重视遗赠的文化氛围在长期都有助于提高技能劳动力比重以及缓和收入不平等。     

Soziale Marktwirtschaft – das Fundament für Wachstum und Gerechtigkeit

Among all G20 countries, Germany has the lowest level of inequality in terms of disposable income. Germany’s tax and transfer system – which has a strong and effective redistributive impact compared with other countries – plays a key role in this connection. Over the past ten years, positive growth and employment trends have significantly improved opportunities for economic participation and have put a stop to previous trends towards greater income inequality. In order to safeguard efficient growth and redistributive policies in the future, it is essential for Germany to maintain sufficient incentives for investment, innovation and employment. Political reform strategies to ensure equality of opportunity should aim to achieve a more broad-based accumulation of private wealth and to strengthen labour force participation. The promotion of lifelong education and training, and the economic and social application of the knowledge created in this process, will play a decisive role in achieving these objectives.     

The missing link: knowledge diffusion and entrepreneurship in endogenous growth

The intellectual breakthrough contributed by the new growth theory was the recognition that investments in knowledge and human capital endogenously generate economic growth through the spillover of knowledge. However, endogenous growth theory does not explain how or why spillovers occur. This paper presents a model that shows how growth depends on knowledge accumulation and its diffusion through both incumbents and entrepreneurial activities. We claim that entrepreneurs are one missing link in converting knowledge into economically relevant knowledge. Implementing different regression techniques for the Organisation for Economic Co-operation and Development (OECD) countries during 1981 to 2002 provides surprisingly robust evidence that primarily entrepreneurs contributed to growth and that the importance of entrepreneurs increased in the 1990s. A Granger test confirms that causality goes in the direction from entrepreneurs to growth. The results indicate that policies facilitating entrepreneurship are an important tool to enhance knowledge diffusion and promote economic growth.     

Timing of trade liberalization

Abstract

This paper studies the effects of trade liberalization on growth and long-run global income inequality using a two-country model of human capital accumulation by credit-constrained households. I show that the timing of trade liberalization is a crucial determinant of its effects on growth. Moreover, I show that the size of the long-run income gap between the two countries depends on the difference in domestic income inequality when they open up to trade. Based on these results, I analyze the effects of redistributive policy within a country. I show that redistribution in one country may increase income per capita of its trading partner if it is undertaken in a steady state, while the opposite is true if the policy is undertaken during transition.     

Who financed the expansion of the equity market? Shareholder clienteles in Victorian Britain

Who financed the great expansion of the Victorian equity market, and what attracted them to invest? Using data on 453 firm-years and over 172,000 shareholders, we find that the largest providers of capital were rentiers, men with no formal occupation who relied on investment income. We also see a substantial growth in women investors as time progressed. In terms of clientele effects, we find that rentiers invested in large firms, whilst businessmen were the venture capitalists of young, regional enterprises. Women and the middle classes preferred safe investments, whilst financiers and institutional investors were speculators in foreign companies. Our results may help to explain the growth of new types of assets catering for particular clienteles, and the development of managerial policies on dividends and share issues.     

未被观测经济与居民收入不平等——基于中国省级面板数据的实证研究

未被观测经济（NOE）对经济发展具有诸多影响,但对居民收入不平等的影响尚未引起足够重视。文章基于动态均衡解的劳动报酬模型得到,随着NOE规模扩大,收入不平等程度（即劳动者从事NOE部门的报酬与从事可观测部门的报酬之差）呈现单调递增的变化过程,但边际变化率先增后减。当考虑劳动者决策的随机动态调整因素时,NOE规模与收入不平等之间存在高低两个动态变化均衡点。在该模型基础上,基于2000-2010年中国省级面板数据,证实了NOE规模与居民收入不平等之间存在显著正向影响关系,人力资本水平、市场化程度和腐败水平也与居民收入不平等呈正向影响关系,而城市化水平则呈较显著的负向影响关系。基于实证结果,提出了相关的政策建议,并对未来研究方向进行展望。     

国外金融发展影响收入不平等研究综述

金融发展对经济增长的积极推动作用已得到学术界的广泛认可,国外的大量研究进一步指出．金融发展通过实物资本投资、人力资本投资两大主要渠道对社会收入不平等产生影响。对文献的系统梳理和归纳将对促进我国经济增长及缓解收入差距提供理论依据,也对推动国内研究起到积极作用。     

Trade Policy in Burundi: Reform Without Political Stability

This paper evaluates Burundi's progress with trade policy reform, by comparing earlier analyses of Burundi's trade policies undertaken in the 1980s with that of the WTO's recent Trade Policy Review. Since the mid‐1980s Burundi has been trying to reform its trade and macroeconomic policies against the background of continuous socio‐political tensions and periodic outbreaks of violent tribal conflict. A ‘then and now’ comparison allows us to assess both the extent of the trade reforms and of the economic return to those reforms. It is evident that there has been a significant rationalisation and simplification of trade policy. Burundi has eliminated most quantitative import restrictions and reduced the average level and range of its tariffs. The scope for allocative distortions, undesirable redistributive effects and for impediments to investment and growth has been substantially reduced. However, a return to reform in terms of export growth or diversification and of overall economic growth is not discernible yet. This is unsurprising, given the scale of the economic disruption. Sustained socio‐political stability, among other things, will be required to induce the investment in human and physical capital needed for a positive return to trade policy reform.     

Political cycles under external economic constraints: Evidence from Cyprus

This paper examines the presence of political cycles in a small open economy using data from Cyprus over the period 1978–2006, and explores their conditionality upon external economic constraints, such as globalization and European integration. Two basic results emerge. First, we find evidence of partisan shifts in economic policies and outcomes, although these effects seem to decrease as globalization progresses, and to disappear in the run-up to EMU. This implies that, while partisan cycles can emerge under a certain domestic political setting, the sensitivity of an economy to globalization pressures and the challenges resulting from EU/EMU membership can lead to their weakening. Second, we find evidence of electoral shifts in certain, more visible, subcomponents of the fiscal balance. However, in contrast to partisan distinctions, these opportunistic effects become more pronounced as globalization proceeds. It seems that constraints imposed on the ability of politicians to ingratiate themselves with partisans, may actually strengthen their incentives to engage in electioneering.     

Are Human and Social Capital Linked? Evidence from India

This paper develops a two‐period Overlapping Generations (OLG) model of endogenous growth in which a two‐way relationship between social capital and human capital is studied. In order to illustrate the impact of public policies, the model is calibrated using the data for a low‐income country, India and a sensitivity analysis is reported under different parameter values. Based on the numerical analysis, this paper focuses on possible trade‐offs in the allocation of government spending between two productive components, that is, social capital‐related activities and education. The results of this paper show that an increase in the share of public spending on social capital‐related activities through a cut in spending on education or vice versa entails trade‐offs. However, the trade‐off fades away and the net impact on long‐run growth turns out to be positive for different parameter values in the case where a higher share of spending on education is financed by a cut in spending on social capital‐related activities but a policy in improving social capital accumulation at the expense of education is always detrimental to long‐run growth.     

Export Specialisation and Local Economic Growth

This paper aims to provide empirical evidence on whether export specialization or diversification is better for local economic growth. Using export data from 354 magisterial districts of South Africa for 1996 and 2001 we estimate spatial growth regressions that include measures of the degree of export specialization and diversification. Overall, exporting regions outperform other (less or non‐) exporting regions. Also, we find that export specialisation, rather than export diversification, has been associated with local economic growth; with specialization in mining and agriculture being especially beneficial. Our results support the view that specialization in a locality’s area of comparative advantage is good for local economic development. We also find that localities with higher initial levels of human capital, and higher subsequent population growth, performed better. This is consistent with the belief that policies aimed at strengthening human capital and improving agglomeration economies, will enhance local economic development.     

城乡收入差距与经济增长关系的实证研究——基于中国1978—2007年数据的协整检验与脉冲响应分析

对中国1978—2007年数据的实证研究结果表明：城乡收入差距与经济增长之间存在着长期稳定的双向因果关系：城乡收入差距只在短期内对经济增长产生影响;而经济增长并不会自动导致城乡收入差距的缩小,相反,经济增长在中长期内还会进一步加大城乡收入差距。     

智力外流、人力资本积累与经济增长——基于我国省级面板数据的实证研究

本文利用2001-2010年的中国省级面板数据,采用系统广义矩估计的方法,就智力外流通过作用于人力资本积累对流出国经济增长的影响进行实证检验。研究结果显示:(1)中国智力外流通过激励人力资本形成与积累显著促进了国内的经济增长;(2)内陆欠发达地区智力外流的人力资本激励效应的边际作用比较大,而沿海发达地区人力资本影响经济增长的效果更强,总体来看,智力外流的经济增长效应在沿海发达地区更加明显;(3)通过引入交互项,本文还发现智力外流通过人力资本激励效应对经济增长的影响随智力流动规模的扩大而提高,进一步引发对中国最优智力外流水平的思考。     

Going Public to Grow? Evidence from a Panel of Italian Firms

This paper investigates the consequences of the decision to go public for the growth of Italian firms using US firms as a benchmark for comparison. We find Italian firms conducting IPOs are larger than US firms, but raise fewer funds from the IPO and grow more slowly afterwards. We also compare Italian IPOs across time. Firms going public in the 1990s display features that are more similar to US IPOs. We describe changes to the Italian economy and financial markets that are potentially responsible for the change. We compare firms of different size and with different governance structures, and we find that they behave differently after going public. Our results suggest that going public does not guarantee faster growth or more jobs. As such, public policies that simply increase access to equity markets may not be effective unless they provide incentives for the firms’ decision-makers to use the new capital to grow.