Fairness,trade, and inequality

We develop a model of international trade between two symmetric countries that features inter-group inequality between managers and workers, and also intra-group inequality within each of those two groups. Individuals are heterogeneous with respect to their managerial ability, and firms run by more able managers have a higher productivity level and make higher profits. There is rent sharing at the firm level due to fair wage preferences of workers, and hence firms with higher profits pay higher wages in equilibrium in order to elicit their workers' full effort. We show that in this framework international trade leads to a self-selection of the best firms into export status, with exporting firms having to pay a wage premium. Aggregate welfare increases, but there is also larger inequality along multiple dimensions: Involuntary unemployment and income inequality between managers and workers increase, and so does inequality within these two subgroups of individuals, as measured by the respective Gini coefficients.     

Education bias of trade liberalization and wage inequality in developing countries

The aim of this article is to examine the impact of increased trade on wage inequality in developing countries, and whether a higher human capital stock moderates this effect. We look at the skilled–unskilled wage differential. When better educated societies open up their economies, increased trade is likely to induce less inequality on impact because the supply of skills better matches demand. But greater international exposure also brings about technological diffusion, further raising skilled labour demand. This may raise wage inequality, in contrast to the initial egalitarian level effect of human capital. We attempt to measure these two opposing forces. We also employ a broad set of indicators to measure trade liberalization policies as well as general openness, which is an outcome, and not a policy variable. We further examine what type of education most reduces inequality. Our findings suggest that countries with a higher level of initial human capital do well on the inequality front, but human capital which accrues through the trade liberalization channel has inegalitarian effects. Our results also have implications for the speed at which trade policies are liberalized, the implication being that better educated nations should liberalize faster.     

The endogenous skill bias of technical change and wage inequality in developing countries

This paper draws on existing empirical literature and an original theoretical model to argue that technical change does not have to be skill-biased in developing countries. Instead, the extent to which technology adoption in developing countries favors skilled workers depends on a number of factors. Free trade induces technology that favors skilled workers in skill-abundant developing countries and that favors unskilled workers in skill-scarce developing countries, and therefore amplifies the predicted wage effects of trade liberalization. Developing countries experience technical change that is skill-biased when imported skill-biased technologies become relatively cheaper. Increased skill supply further biases technical change in favor of skilled labor. These features aid our understanding of the observed rises in inequality within developing countries, the absence of a significant downward effect of expanded educational attainment on skill premia, and the differential effects of trade liberalization on inequality.     

Trade, wages, and the political economy of trade protection: evidence from the Colombian trade reforms

Worker industry affiliation plays a crucial role in how trade policy affects wages in many trade models. Yet, most research has focused on how trade policy affects wages by altering the economy-wide returns to a specific worker characteristic (i.e., skill or education) rather than through worker industry affiliation. This paper exploits drastic trade liberalizations in Colombia in the 1980s and 1990s to investigate the relationship between protection and industry wage premiums. We relate wage premiums to trade policy in an empirical framework that accounts for the political economy of trade protection. Accounting for time-invariant political economy factors is critical. When we do not control for unobserved time-invariant industry characteristics, we find that workers in protected sectors earn less than workers with similar observable characteristics in unprotected sectors. Allowing for industry fixed effects reverses the result: trade protection increases relative wages. This positive relationship persists when we instrument for tariff changes. Our results are in line with short- and medium-run models of trade where labor is immobile across sectors or, alternatively, with the existence of industry rents that are reduced by trade liberalization. In the context of the current debate on the rising income inequality in developing countries, our findings point to a source of disparity beyond the well-documented rise in the economy-wide skill premium: because tariff reductions were proportionately larger in sectors employing a high fraction of less-skilled workers, the decrease in the wage premiums in these sectors affected such workers disproportionately.     

Skill classification does matter: estimating the relationship between trade flows and wage inequality

Empirical work must pay careful attention to how it measures the relative skill abundance of countries and the relative skill intensity embodied in trade flows. This paper compiles a new data set, using income levels, average education, manufacturing wages, and an index of these three variables, to classify countries and trade flows as relatively high skill or low skill. Then, in order to show the importance of skill classification, it uses a reduced-form fixed-effects model to estimate the relationship between trade flows and wage inequality. This specification not only controls for any time-invariant omitted variables, but also permits the inclusion of a large number of diverse countries. When more accurate skill rankings are utilized, results suggest that, in high-skill abundant countries, increased trade with lower-skill countries is correlated with an increase in wage inequality. This relationship is significant and highly robust and is driven by the negative relationship between trade and low-skill wages (instead of a positive relationship between trade and high-skill wages.) Results, however, are highly dependent on the skill classification utilized.     

贸易自由化对工资差距的影响及作用机制--基于中国制造业企业的实证研究

本文利用世界银行的中国企业调查数据分析贸易自由化对工资差距的影响,结果表明贸易自由化显著提升企业内工资差距。企业进口投入品的行为使其内部普通员工的最高与最低工资之比提高约50％,总经理与中层经理的工资比提高约30％,中层经理与普通员工的工资比提高约12％－20％。进一步分析表明,自由贸易使企业对高技能劳动力的需求更大,更倾向于采用绩效工资、进行研发投资、提供员工培训和使用计算机,这些因素均导致工资差距的上升。     

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.     

Globalization and wage inequality: Evidence from urban China

This paper examines the impact of globalization on wage inequality using Chinese Urban Household Survey data from 1988 to 2008. Exploring two trade liberalization shocks, Deng Xiaoping's Southern Tour in 1992 and China's accession to the World Trade Organization (WTO) in 2001, we analyze whether regions more exposed to globalization experienced larger changes in wage inequality than less-exposed regions. Contrary to the predictions of the Heckscher–Ohlin model, we find that the WTO accession was significantly associated with rising wage inequality. We further show that both trade liberalizations contributed to within-region inequality by raising the returns to education (the returns to high school after 1992 and the returns to college after 2001).     

Can income inequality promote democratization?

The aim of this paper is to study the effect of income inequality on the probability of democratization, in a panel of 51 transition countries during the period 1960–2008. Using a conditional fixed-effect logit estimation, we find robust results suggesting that income inequality (measured by the Gini index of household’s income inequality) has an inverse—U-shaped relation with the probability of transition from autarchy to democracy. We show that there is a turning point at a level of household’s income inequality equal to a Gini index of 40. When income inequality is below 40, then probability of transition is positively related to inequality, but when inequality is higher, a subsequent increase in inequality decreases the probability of democratization. This is consistent with Acemoglu and Robinson’s theory that shows how transitions are likeliest at moderate levels of inequality, while autocracy is likelier at the lowest and highest levels of inequality.     

Who Supports Free Trade in Latin America?

This paper examines individual trade policy preferences across 17 countries in Latin America. The focus is on whether skilled or unskilled workers are more likely to support liberalised trade and on whether country characteristics, such as factor endowments, alter the preferences of skilled and unskilled workers. Based on the standard Heckscher‐Ohlin model and the Stolper‐Samuelson theorem, wage inequality in developing countries will decrease under free trade and unskilled workers will benefit. We find that on average skilled workers are more likely than unskilled workers to support free trade in Latin American countries. Separate country regressions reveal that this pattern is only statistically significant in 8 out of 17 Latin American countries. However, there are no countries in our sample in which unskilled workers are statistically more likely to support free trade than skilled workers, not even in the lowest skill‐endowed country in the sample. We also find that people from Latin American countries with higher GDP, faster growth, more cropland and a longer period of time since reform were more likely on average to support free trade.     

Trade liberalization in asian newly industrialized countries

Singapore, South Korea, and Taiwan are often perceived as having achieved similar trade patterns; nevertheless, their trade policies and patterns differ in fundamental respects. In this study, three models are considered and different aspects of the trade liberalization policies of these three countries are highlighted. The model of South Korea underscores the significance of product market concentration in restraining real wage growth and contributing to income inequality. The model of Singapore highlights the role of foreign investment in producing manufactured goods for export and in raising real wages. The factor proportions model of a labor-abundant economy adequately describes the Taiwanese liberalization. The model's predictions of rising real wages and no monopoly profits are consistent with Taiwan's declining income inequality.     

贸易自由化对中国城镇劳动力市场性别歧视的影响

贸易自由化既可缩小也可扩大性别工资差。绝大多数实证研究,例如Oosdendorp(2004),都采用的是较宏观的行业加总数据,并着重于职业性别工资差。然而,行业加总的职业工资不能控制教育水平和经验变量,因此很难判断性别工资差的变化到底来自个人特征因素还是贸易自由化。文章运用中国城镇居民家庭的微观数据,运用difference-in-difference的方法,在消除了不随时间改变的固定效应和随时间变化的系统冲击的基础上,检验了1988年到1995年中国第一次贸易自由化兴起时期,贸易开放度的变化对不同教育水平的性别工资差的影响。结果显示,这一时期贸易开放度和性别工资差之间的相互关系主要来源于进口开放度的变化:随着进口开放度的上升,低教育人群的性别工资差显著扩大,而高教育人群的性别工资差却呈现相反趋势。出口开放度的上升对低教育人群的性别工资差没有显著影响,但与进口开放度的上升一样,它缩小了高教育人群的性别工资差。     

Would Freeing Up World Trade Reduce Poverty and Inequality? The Vexed Role of Agricultural Distortions

Trade policy reforms in recent decades have sharply reduced the distortions that were harming agriculture in developing countries, yet global trade in farm products continues to be far more distorted than trade in non‐farm goods. Those distortions reduce some forms of poverty and inequality but worsen others, so the net effects are unclear without empirical modelling. This article summarises a series of new economy‐wide global and national empirical studies that focus on the net effects of the remaining distortions to world merchandise trade on poverty and inequality globally and in various developing countries. The global Linkage model results suggest that removing those remaining distortions would reduce international inequality, largely by boosting net farm incomes and raising real wages for unskilled workers in developing countries, and would reduce the number of poor people worldwide by 3 per cent. The analysis based on the Global Trade Analysis Project model for a sample of 15 countries, and nine stand‐alone national case studies, all point to larger reductions in poverty, especially if only the non‐poor are subjected to increased income taxation to compensate for the loss of trade tax revenue.     

Bilateralism, multilateralism, and the quest for global free trade

We develop an equilibrium theory of trade agreements in which both the degree and the nature (bilateral or multilateral) of trade liberalization are endogenously determined. To determine whether and how bilateralism matters, we also analyze a scenario where countries pursue trade liberalization on only a multilateral basis. We find that when countries have asymmetric endowments or when governments value producer interests more than tariff revenue and consumer surplus, there exist circumstances where global free trade is a stable equilibrium only if countries are free to pursue bilateral trade agreements. By contrast, under symmetry, both bilateralism and multilateralism yield global free trade.     

我国教育不平等与收入分配差距扩大的动态研究——一项基于各地区教育基尼系数的实证

以教育基尼系数作为刻画教育不平等的指标,选取相关省级面板数据,采用固定效应变截距模型,对我国教育不平等与收入分配差距扩大的关系进行动态研究发现：我国教育不平等与收入分配差距显著正相关．教育不平等每上升1个百分点,收入分配差距将扩大0．412～0．618个百分点,并且,随着时间的推移,教育不平等对收入分配差距的影响越来越大;同时,随着平均受教育年限的延长,我国收入分配差距不仅没有缩小反而在不断扩大。因此,政府应加大教育投入,提高教育资源利用率,发展高级人才市场。以缩小由于教育不平等导致的收分配差距扩大。     

Investment liberalization and international trade

This paper estimates the cross-price elasticity of exports with respect to investment costs for bilateral relations between 36 countries. We show that the effect of reducing foreign direct investment costs on exports depends on country characteristics and trade costs as predicted by the [Markusen, 1997] and [Markusen, 2002] model. When countries differ in relative factor endowments and trade costs are low, investment liberalization stimulates exports, whereas when countries are similar in terms of relative factor endowments and size, and trade costs are moderate to high, investment liberalization reduces exports.     

Globalisation and Inter‐occupational Inequality: Empirical Evidence from OECD Countries

How does globalisation affect inter‐occupational wage inequality within countries? This paper examines this by focusing on two dimensions of globalisation: openness to trade and openness to capital flows, using a relatively new data set on occupational wages. Estimates from a dynamic model for 15 OECD countries spanning the period 1983–2003 suggest that increased openness increases occupational wage inequality in poorer OECD countries as predicted by the Heckscher–Ohlin–Samuelson model, but for the more advanced OECD countries, we find no significant effect. The absence of the expected result for the latter category can be due to a rapid increase in the supply of skilled labour, to outsourcing of skilled jobs or because changes in the trade flows are too small to have any significant effect in those countries.     

Real Output Convergence and Trade Openness: Fuzzy Clustering and Time Series Evidence

In the now extensive literature on the convergence of real per capita output across countries over time, there is surprisingly little attention paid to the role of international trade. Some recent studies have illustrated that standard trade theories provide no clear prediction as to the impact of trade liberalization on output convergence. These studies have also provided somewhat ambiguous empirical evidence regarding this relationship, under-scoring the need for additional results in this area. This paper uses both standard and new approaches to testing for convergence in order to explore the extent to which the degree of trade openness may affect output convergence among countries. Using annual time-series data for 88 countries from the Penn World Table, we obtain somewhat mixed results, but on balance they are quite supportive of a positive relationship (though not necessarily causality) between trade openness and output convergence. Our results also suggest certain directions for further research that would shed more light on this important issue.     

The role of trade and offshoring in the determination of relative wages and child labour

Incorporating family decisions in a two-period model of the world economy, we predict that trade liberalization raises the skill premium and reduces child labour in developing countries where the adult labour force is sufficiently well educated to attract production activities from abroad that will increase the demand for skilled relative to unskilled labour. Elsewhere, liberalization will reduce the skill premium, but it will not necessarily raise child labour. Our prediction is not rejected by the data, and it explains why child labour is negatively associated with trade openness in those developing countries where the labour force was relatively well educated when the liberalization took place, but not elsewhere.     

Migration and trade: Theory with an application to the Eastern-Western European integration

The remarkable increase in trade flows and in migratory flows of highly educated people are two important features of globalization of the last decades. This paper extends a two-country model of inter- and intra-industry trade to a rich environment featuring technological differences, skill differences and the possibility of international labor mobility. The model is used to explain the patterns of trade and migration as countries remove barriers to trade and to labor mobility. We parameterize the model to match the features of the Western and Eastern European members of the EU and analyze first the effects of the trade liberalization which occurred between 1989 and 2004, and then the gains and losses from migration which are expected to occur if legal barriers to labor mobility are substantially reduced. The lower barriers to migration would result in significant migration of skilled workers from Eastern European countries. Interestingly, this would not only benefit the migrants and most Western European workers but, via trade, it would also benefit the workers remaining in Eastern Europe.