Analyses of non-fatal accidents in an opencast mine by logistic regression model – a case study

Accidents cause major damage for both workers and enterprises in the mining industry. To reduce the number of occupational accidents, these incidents should be properly registered and carefully analysed. This study efficiently examines the Aegean Lignite Enterprise (ELI) of Turkish Coal Enterprises (TKI) in Soma between 2006 and 2011, and opencast coal mine occupational accident records were used for statistical analyses. A total of 231 occupational accidents were analysed for this study. The accident records were categorized into seven groups: area, reason, occupation, part of body, age, shift hour and lost days. The SPSS package program was used in this study for logistic regression analyses, which predicted the probability of accidents resulting in greater or less than 3 lost workdays for non-fatal injuries. Social facilities-area of surface installations, workshops and opencast mining areas are the areas with the highest probability for accidents with greater than 3 lost workdays for non-fatal injuries, while the reasons with the highest probability for these types of accidents are transporting and manual handling. Additionally, the model was tested for such reported accidents that occurred in 2012 for the ELI in Soma and estimated the probability of exposure to accidents with lost workdays correctly by 70%.     

Foreign direct investment and civil violence in Sub-Saharan Africa

Despite the steady growth in foreign direct investment (FDI) flow into Sub-Saharan Africa (SSA), which is facilitated by the United Nations "2030 Agenda for Sustainable Development", economic development in SSA countries remains relatively weak, due in part to frequent incidents of civil violence. The critics of FDI inflow into SSA posit that the cross-border capital flow fuels civil conflict and unrest, whilst the proponents maintain that FDI inflow helps developing countries raise their economies. To reconcile these two views, this paper considers the impact of FDI on civil violence in SSA by distinguishing recipient industries of FDI. The results from a new general equilibrium theory suggest that an increase in resource-directed FDI inflow to countries where the resource sector is skilled labour (unskilled labour) intensive reduces (increases, respectively) the risk of violence. Using a panel data consisting of 34 SSA countries for 1972–2013, the dynamic panel estimates provide support for our theoretical findings. In particular, an increase in FDI inflow reduces the risk of civil violence for skilled labour intensive fuel-resource-rich SSA countries. However, the likelihood of violence can increase in FDI inflow for countries that are rich in unskilled labour intensive non-fuel, ore and other mineral resources.     

Trade liberalisation and human capital adjustment

This paper highlights the way in which workers of different ages and abilities are affected by anticipated and unanticipated trade liberalisations. A two-factor (skilled and unskilled labour), two-sector Heckscher-Ohlin trade model is supplemented with an education sector which uses skilled labour and time to convert unskilled workers into skilled workers. A skilled worker's income depends on her ability, but all unskilled workers have the same income. Trade liberalisation in a relatively skilled labour abundant country increases the relative skilled wage and induces skill upgrading by the existing workforce, with younger and more able unskilled workers most likely to upgrade. But not all upgraders are better off as a result of the liberalisation. The older and less able upgraders are likely to lose. For an anticipated liberalisation we show that the preferred upgrading strategies depend on a worker's ability and that much of the upgrading will take place before the liberalisation. Hence some workers who would have upgraded had they anticipated the liberalisation will not if it is unanticipated, and adjustment assistance that applies only to post-liberalisation upgraders will fail to compensate some losers and distort the upgrading decisions of others.     

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.     

对外开放与中国制造业工资差距——基于劳动力供需模型的实证检验

选取1998—2006年中国26个省市的面板数据,利用结合劳动力供需的对外开放影响工资差距的理论模型,就对外开放对制造业熟练和非熟练工人工资差距的影响进行实证研究。研究发现:从全国样本看,外商直接投资有利于缩小制造业熟练与非熟练工人工资差距,而贸易开放与制造业熟练和非熟练工人工资差距则是一种倒"U"型的关系。在分地区讨论时,发现外商直接投资对中西部地区制造业熟练与非熟练工人工资差距的缩小作用要大于东部地区,贸易开放对中西部地区制造业熟练与非熟练工人工资差距存在显著的正向影响,而对东部地区的影响不显著,这进一步验证了上述倒"U"型关系的实证结果。     

The rise of the machines: Capital imports and real manufacturing wages in 57 nations

Outward-oriented policy reform has attracted a large number of academics to the study of the trade-labour market nexus. One of these fields has focused on capital intensive (machinery) imports and its effect on manufacturing wages. The skill-enhancing-trade (SET) hypothesis was put forth to explain a potential relationship where an inflow of capital imports results in increased demand for skilled labour and decreased that of unskilled labour, and thus resulted in a rise in skilled wages and a decrease in their unskilled counterparts. This study revisits this hypothesis with a panel from the manufacturing sector of 57 nations. We improve upon previous studies in a number of ways. We add developed nations to the sample and examine capital imports from rich countries as well as the rest of the world. This takes into account the prominence of vertical production networks in international trade. We adhere closely to the neo-classical trade model and employ definitions of skilled and unskilled workers that capture the production process of particular items. Finally, we fit a robust dynamic panel data model that accounts for the endogeneity of the determinants of trade and wages. In this way we test whether the SET hypothesis is generally applicable as opposed to previous studies which use an ad hoc selection of countries and variables. We find that the SET hypothesis is not driving changes in manufacturing wages. Instead, worker productivity and GDP per capita explain these labour market outcomes.     

Optimal immigration, education and growth in the long run

The paper extends Manning's model on education and balanced growth to include labour immigration. Each immigration unit is assumed to consist of one skilled worker and some unskilled members. The optimal immigration policy which maximizes the per capita steady-state consumption of the host country is derived. We show that optimal immigration policy can reduce the steady-state skilled labour ratio. More interesting still, contrary to the widespread belief that immigration of skilled workers hurts local skilled workers, it is the unskilled local workers whose interests are threatened by optimal immigration policy.     

Evaluating the foreign ownership wage premium using a difference-in-differences matching approach

This paper seeks to identify the causal effect of foreign acquisitions on wages of skilled and unskilled workers, using difference-in-differences propensity score matching estimators. Our results suggest that there is substantial heterogeneity in the post-acquisition wage effect depending on the nationality of the foreign acquirer and the skill group of workers. We find sizable post acquisition wage effects on skilled and unskilled wages following an acquisition by a US firm. No such impacts result from acquisitions by EU multinationals. Also we discern some positive wage effects for unskilled workers resulting from acquisitions by multinationals from the rest of the world.     

Minimum wages and information

The paper investigates the impact of minimum wage legislation on the level of employment, both for skilled and unskilled labor, when employers are imperfectly informed about a potential employee’s skill level prior to hiring. In this context, imposition of a minimum wage can facilitate the skilled employee’s provision of information about his skill. When laborers can take a certifying test, minimum wages facilitate the sorting effect of the test. If the supply of skilled labor is sufficiently elastic relative to the demand for unskilled labor, this enhancement of the sorting effect can increase total employment, and reduce prices.     

Foreign direct investment and wages: a cross-country analysis

While globalization has led to overall economic growth in a number of countries, questions abound on its distributional effects, especially on rising wage inequality across nations. The main objective of this study is to investigate empirically the effects of foreign direct investment (FDI) on wages in a cross-country setting. We investigate the general equilibrium propositions that capital inflows (outflows) increase (lower) wages in host (home) countries due to the change in relative factor endowments. We also explore whether capital inflows have differential impacts on skilled and unskilled wages in developing economies. Time-series data on 26 countries, 15 developed and 11 developing, are used to fit the labour share equation derived from a translog GNP function with net FDI stock as one of its arguments. Results confirm that capital movement brings about a cross-country convergence of wages. However, there is some evidence that inward FDI flows increase the wage gap between skilled and unskilled workers in developing countries.     

FDI and the skill premium in a North–South global economy

The effect of FDI from North to South countries on the skill premium of both groups of countries is examined. The lower wage of unskilled labor in the South induces the Northern firms to shift the unskilled labor intensive production processes in the South. FDI occurs in an unskilled labor intensive activity, but in a skill-intensive sector. It is shown that this leads to an increase in the skill premium of skilled labor in both North and South.     

International Outsourcing and the Skill–Specific Wage Bill in Eastern Europe

This paper analyses the effects of international fragmentation in terms of intermediate goods trade on the dynamics of the skilled–to–unskilled labour wage bill ratio in 14 manufacturing industries of the Czech Republic, Hungary and Poland. Both intermediate goods exports and imports of the CEEC exhibit a positive impact on the wage bill ratio. Since 1993, intermediate goods trade with the EU alone has accounted for a considerable reduction of the predicted annual change in the skilled–to–unskilled wage bill ratio in the three CEEC.     

Preference heterogeneity, wage inequality, and trade

We consider individuals who value product variety, and who can be skilled or unskilled as workers. Skilled people prefer to consume skill-intensive goods. We show that under plausible conditions an increase in the relative size of the skilled population increases the relative wage of skilled workers, thereby increasing wage inequality. In our two-country model of trade, an increase in the relative supply of skilled labor in either country increases the relative wage of skilled workers, and hence increases inequality in both countries.     

Wage Inequality in the United Kingdom: Trade and/or Technology?

I employ two alternative intra‐industry trade Applied General Equilibrium (AGE) models to explain some stylised facts of the British economy. The model with skill‐biased technical change (i.e. exogenous skill‐biased technical change à la Solow) can explain the rise in wage inequality between skilled and unskilled workers, the decline in manufacturing and the expansion of modern services. However, the model where technical change is trade‐induced (i.e. endogenous sector‐biased technical change à la Romer) performs better, because it can also explain the exponential rise of imported intermediate capital goods and developments in the wage rate of unskilled workers.     

Economic Reform,Skill Formation and Foreign Capital

Does trade liberalisation promote skill formation and positively influence the inflow of foreign capital in an economy? How do incentives offered to foreign capital affect skill formation and skilled‐unskilled wage inequality? Is liberalisation of agricultural exports counterproductive to skill formation and foreign capital inflow in the economy? We try to capture these relationships between foreign capital and skill formation in a small open economy facing various exogenous shocks. Among other results, we show that import liberalisation increases skill formation and the inflow of foreign capital in the country. We explore the evolving state of the skilled‐unskilled wage gap in a regime of greater skill formation.     

Foreign Direct Investment,Productivity, Demand for Skilled Labour and Wage Inequality: An Analysis of Uruguay

This study seeks to identify the causal effects of foreign ownership on productivity, the demand for skilled labour and wage inequality. With this aim, we use differences‐in‐differences techniques for a panel of Uruguayan manufacturing firms in the period 1997–2005. Our results seem to indicate that FDI causes higher productivity and increased demand for skilled labour. Furthermore, although average wages are higher in foreign‐owned firms than in domestic ones, the wage gap between skilled and unskilled workers is wider. It follows that promoting foreign investment enhances productivity. In addition, due to the greater demand for skilled workers, policies such as training schemes would be conducive to raising productivity still further, while other social policies could help to mitigate the wage inequality effects.     

国际产品内贸易对中国收入分配的效应研究——基于中国工业行业数据的经验分析

采用中国35个工业行业的面板数据,检验国际产品内贸易对中国行业内部熟练劳动力和非熟练劳动力收入分配的效应。研究表明:现阶段,与技术进步相比,国际产品内贸易并不是造成中国收入差距拉大的重要影响因素;同时,由于中国熟练劳动力要素禀赋的相对缺乏,国际产品内贸易发生的行业要素密集度不同,对收入分配的影响也不同,其中劳动密集型和资本密集型行业内不同性质劳动者的收入差距会缩小,而技术密集型及兼具资本密集型和技术密集型的行业内收入差距则会拉大。     

Trade liberalization and the evolution of skill earnings differentials in Brazil

Skilled labor earnings differentials decreased during the trade liberalization implemented in Brazil from 1988 to 1995. This paper investigates the role of trade liberalization in explaining these relative earnings movements. We perform several independent empirical exercises that check the traditional trade transmission mechanism, using disaggregated data on tariffs, prices, earnings, employment and skill intensity. We find that: i) employment shifted from skilled to unskilled intensive sectors, and each sector increased its relative share of skilled labor; ii) relative prices fell in skill-intensive sectors; iii) tariff changes across sectors were not related to skill intensities, but the pass-through from tariffs to prices was larger in skill-intensive sectors; iv) the decline in skilled earnings differentials mandated by the price variation predicted by trade was even larger than the observed one. The results are compatible with trade liberalization accounting for the observed relative earnings changes in Brazil. They also highlight the importance of considering the effects of differentiated pass-through from tariffs to prices.     

Open trade and skilled and unskilled labor productivity in developing countries: A panel data analysis

Abstract

This paper examines the effect of trade openness on the productivity of skilled and unskilled labor in a group of 36 developing countries using panel data and fixed effect approach. We have developed and utilized an empirical model that readily lends itself to testing the hypothesis posed. Our results support the hypothesis that trade openness has a positive and significant impact on labor productivity for both skilled and unskilled labor in the sample countries. We also observe that the beneficial effect of trade openness is relatively stronger for the skilled labor than the unskilled labor. We conclude that contrary to the claim made by Mayda and Rodrik (2001 Mayda, A. M. and Rodrik, D. 2001. “Why are some people (and countries) more protectionist than others? A cross country analysis”. Mimeo: Harvard University.  [Google Scholar]), skilled workers in developing countries may oppose protectionism. When adjusting for the purchasing power parity, the impact of trade openness on labor productivity, although positive and significant, is not as pronounced as it is for other definitions of openness.     

Public pollution abatement and wage inequality

This paper constructs three-sector general equilibrium models to investigate how public pollution abatement affects the skilled–unskilled wage inequality. In the basic model with full employment, we find that a higher degree of public pollution abatement will decrease the wage inequality if the intensity of skilled labor in the urban skilled sector is sufficiently large and expand or narrow down the wage gap if this intensity is sufficiently small. In the extended models, we consider other four cases, and obtain the results similar or dissimilar to that of the basic model.