COMPUTER SKILLS AND WAGES*

Data from the 1993 Survey of Training and Education show that 52 per cent of males and 60 per cent of females had at some time used a computer. An analysis using earnings functions reveals that computer usage is associated with a wage premium of between 12 and 16 per cent. Experiments show that omission of a variable recording computer usage from a wage equation will result in a bias of between 10 and 15 per cent in the estimated return to a year of schooling and similar distortion to the estimated return to experience.     

Levels of computer self-efficacy, computer use and earnings in China

Levels of self-efficacy in computer use were found to be positively related to computer use at work among a sample of workers in Shanghai. The simultaneous estimation of computer use and earnings indicated that an earnings premium for computer use accrues only to females, not to males.     

国家职业资格证书、工人技能水平和收入效应——来自5家制造型企业21个生产车间的经验证据

推行国家职业资格证书是我国劳动就业政策的重要内容,也是广大劳动者非学历职业教育的主要方式,对加强技能人才培养、促进劳动力市场建设等方面具有重要意义。本文利用5家制造型企业21个生产车间的调查数据,对国家职业资格证书与工人的技能水平和年收入之间的关系进行了研究。研究发现,获得国家职业资格证书的工人在技能水平上显著高于无证工人,证书等级越高,技能水平越高。与无证工人相比,初级工和中级工证书的收入效应约为9.5%,高级工证书的收入效应为11.0%,技师及以上等级证书的收入效应显著上升至24.0%。进一步的分析揭示,初级工、中级工和高级工证书的收入效应主要是因为工人技能水平提高带来的;技师以上等级证书的收入效应一方面来源于工人技能水平的提高,另一方面则是由一些非技能因素造成的。     

EARNINGS INEQUALITY IN USA, 1969–99: COMPARING INEQUALITY USING EARNINGS EQUATIONS

A simple decomposition method using an earnings equation is proposed by synthesizing two decomposition methodologies, those of Juhn, Murphy, and Pierce (1993) and Fields (2003), in order to study changes in earnings inequality in America during the last three decades in the 20th century. The proposed method enables us to compute both aggregate and detailed decompositions of changes in earnings inequality. The decomposition of earnings inequality change during the last three decades in 20th century shows that the increase in earnings inequality in America was caused by changes in the wage structure and the distribution of unobservables. The premium to education contributes substantially to the widening of earnings inequality during the 1980s and 1990s. A decreasing male wage premium contributes to leveling earnings inequality.     

The Impact of Exporting and Export Destination on Manufacturing Wages: Evidence for Sub-Saharan Africa

This paper investigates wage effects of trade status of African firms. Using data for manufacturing firms, we find a positive overall association between individual earnings and export status. Moreover, the skill wage premium in exporting firms is significantly higher. These results are consistent with either trade inducing higher wages in the exporting country, or with more productive (higher wage) firms self‐selecting into exporting. The results are not robust, however, to disaggregation by export destination. Exporting to outside Africa generates a negative wage premium whereas exporting to African markets yields a positive premium in export firms of the exporting country. This suggests that there is a disciplining effect on the wages of exporting firms only when exporting is to more competitive markets.     

Is utility additive? The case of alcohol

By using the quantile regressions of earnings equation, we find that the educational wage premium is higher in industries with rapid technological change than in industries with slower technological change at every decile in the distribution of wage residuals. The wage premium associated with the technological change is mostly explained by the returns to workers' unobserved heterogeneities, which are correlated with education, rather than the rents of high-tech industries.     

Earning Curves and Wage Curves

Using British county data for full-time male manual workers we extend earlier work to investigate wage and earning curves. We distinguish between total earnings and hourly wages for standard hours, uncontaminated by overtime premium. Using data from 1980–1995 we find that earnings behaviour is dominated by volatile hours in the short run, while wage growth is highly sensitive to the level of unemployment as in the classical Phillips curve with macro data. Macro evidence for sticky wages is thus confirmed at the local level, and the wage curve of rapid adjustment is rejected for normal hourly wages.     

Wage differentials by sector and gender: a quantile analysis for the Spanish case

This paper analyses existing wage differentials between workers in the public and private sectors and by gender in Spain. This analysis is run throughout the entire earnings distribution and observed wage differentials are decomposed into a part explained by differences in productive characteristics and a part due to differences in returns to such characteristics. Our results show that public sector workers tend to earn higher wages than private employees, although most of this sector wage gap is due to better public workers’ productive characteristics. A wage premium in favour of men is also found in both the public and private sectors, with the gender wage gap greater at the top of the earnings distribution.     

Behind Every Well Paid Married Man: The Impact of the Partner's Earning Opportunity

This paper presents a theoretical bargaining model, which provides a new explanation for the married male wage premium. A worker can extract higher earnings from the firm when married. Whereas the married worker's wage is higher the higher is the income the spouse earns, should the bargaining break down, the worker's wage is negatively correlated with the spouse's current income.     

Higher education enrolment in Bangladesh: does the wage premium matter?

This paper empirically examines the decisions of individuals to enrol in a course of tertiary education in Bangladesh, focussing on the period 1999 to 2009. Of particular interest is whether the wage premium―the gap in wage earnings between tertiary and secondary school graduates―is associated with decisions to enrol in tertiary education. The analytical framework used here is the human capital theory, which is tested through a discrete choice model. Using data from Bangladesh Labour Force Surveys, empirical results suggest that the wage premium is positively associated with decisions of males to enrol in tertiary education, while for females there appears to be no such association. A battery of robustness tests supports our results.     

Economic Growth and Wage Stagnation in Peru: 1998–2012

From 1998 to 2012, the Peruvian economy exhibited rapid growth. Moreover, the composition of the labor force improved in terms of education and experience, two variables that are typically associated to higher human capital. The average worker in 2012 had a higher level of education and was one and a half years older than in 1998, reflecting the impact of the demographic transition. However, the average real wage was roughly constant. We show that a decline in the wage premium for education, and to a minor extent for experience, is responsible for the lack of growth in the average real wage. Had these two premia remained constant throughout the period of analysis, average labor earnings would have increased by about 2.6% per year, of which 0.7 percentage points are accounted for by the changes in the composition of the labor force in terms of age and education. We explore the role of the relative supply of workers with different levels of human capital as an explanation for the decline in the wage premium for education. Finally, we analyze the implications of these findings for some macroeconomic variables, as earnings and wage inequality, the labor share and total factor productivity.     

The Rising College Premium in the Eighties: Return to College or Return to Unobserved Ability?

The changes in the distribution of earnings during the 1980s have been studied extensively. The two most striking characteristics of the decade are (a) a large increase in the college/high school wage gap, and (b) a substantial rise in the variance of wage residuals. While this second phenomenon is typically implicitly attributed to an increase in the demand for unobserved skill, most work in this area fails to acknowledge that this same increase in demand for unobserved skill could drive the evolution of the measured college premium. In its simplest form, if higher ability individuals are more likely to attend college, then the increase in the college wage premium may be due to a increase in the relative demand for high ability workers rather than an increase in the demand for skills accumulated in college. This paper develops and estimates a dynamic programming selection model in order to investigate the plausibility of this explanation. The results are highly suggestive that an increase in the demand for unobserved ability could play a major role in the growing college premium.     

High skills pay off: the changing wage structure during economic transition in Poland

Economic transition turns the inherited wage structure upside down. Changes are rapid and dramatic. The Polish example shows that even in the first year of market-oriented reforms, there was a marked increase in earnings inequality, a dramatic rise in the wage premium for white-collar skills, and a significant jump in the returns to education. In contrast, skills acquired under the old system lost their value. It is younger workers who are rewarded with higher wages. The changes are spearheaded by the private sector, where inequalities and the educational premium are higher than in the public sector. Privatization, thus, has its social aspects in that it strengthens the incentive for human capital investment. This paper documents these changes and sets out possible explanations.     

Gender wage differentials and discrimination in Korea: comparison by knowledge intensity of industries

This study estimates the relative size of the non-productivity-related gender wage gap across industries with differing knowledge intensities. More specifically, a gender wage premium was estimated from a modified Mincerian earnings equation, and an Oaxaca's discrimination coefficient was computed. Empirical evidence indicates that gender wage differentials tend to be less subject to potential discrimination in knowledge-based industries than in other industries with lower knowledge intensity. The estimated discrimination effect is least noticeable in top hierarchical occupations such as professionals and technicians, while it is most sizeable in production workers and sales/service workers, regardless of industrial affiliation.     

Trade liberalization and the inter-industry wage premia: the missingf role of productivity

The literature concerning the effect of tariffs on the inter-industry wage premium has not addressed the role of total factor productivity (TFP) in determining both the wage premium and tariffs. This omission not only overlooks an important determinant of wage premium but also invalidates the use of the pre-reform tariff level as an instrument for the change in tariffs. Based on an analysis of Colombian data, I find that including TFP in the estimated model of the effects of tariffs on the wage premium leads to a 41% decrease in the effect of tariffs on the inter-industry wage premium relative to the model that omits TFP. More specifically, a 10 percentage point decrease in tariffs reduces the wage premium by 1.01%, whereas a 10% increase in TFP raise wage premium by 1.6%. This finding suggests the importance of using policies that boost productivity to offset the effect of tariffs on the wage premium.     

EARNINGS DIFFERENCES BETWEEN CHINESE AND INDIAN WAGE EARNERS, 1987–2004

This paper is one of the first comprehensive attempts to compare earnings in urban China and India over the recent period. While both economies have grown considerably, we illustrate significant cross-country differences in wage growth since the late 1980s. For this purpose, we make use of comparable datasets, estimate Mincer equations and perform Oaxaca–Blinder decompositions at the mean and at different points of the wage distribution. The initial wage differential in favor of Indian workers, observed in the middle and upper part of the distribution, partly disappears over time. While the 1980s Indian premium is mainly due to higher returns to education and experience, a combination of price and endowment effects explains why Chinese wages have caught up, especially since the mid-1990s. The price effect is only partly explained by the observed convergence in returns to education; the endowment effect is driven by faster increase in education levels in China and significantly accentuates the reversal of the wage gap in favor of this country for the first half of the wage distribution.     

Concentration and Wage Earnings in an Open Economy: A Case Study of Korea

The object of this paper is to increase our understanding of the effect of output market power (the degree of concentration in an industry) on wage earnings in Korea. We conduct a series of econometric investigations based on the traditional human capital theory and find that workers in a more concentrated industry are paid higher. This wage premium is not explained in terms of the differences in the quality of labor and/or compensating factors. It suggests to us that the conventional estimates of the misallocation of resources due to the output market power are underestimated since this source of higher unit costs is disregarded. [820]     

Wage premium of Communist Party membership: Evidence from China

Social status and political connections may confer large economic benefits on an individual. Previous studies focused on China have examined the relationship between Communist Party membership and earnings and have revealed a positive correlation. However, the correlation could be partly or totally spurious. Using data from three surveys spanning three decades, we estimate the causal effect of Chinese Communist Party membership on monthly earnings in China. We find that, on average, membership in the Communist Party of China increases monthly earnings and the wage premium has grown in the last three decades. We explore potential causes and discover evidence that improvements in social networks and social rank, acquisition of job‐related qualifications and greater life satisfaction play important roles in increased earnings.     

Investment and interruption: effects of the US experience on the earnings of return migrants in Mexico

Migration is widely viewed as an investment in human capital. However, due to the imperfect transferability of skills and knowledge across countries, migration trips are also career interruptions, especially for return migrants who may meanwhile experience depreciation of home country-specific skills. This article demonstrates that migration experience increases return migrants’ earnings in the home country on the condition that the migration stay is sufficiently long and mostly uninterrupted. Employing the revised human capital earnings function, the empirical study shows that only a barely interrupted US experience longer than five years, regardless of the legal status of the migration trips, predicts higher earnings of male return migrants in Mexico than comparable non-migrants. Robust findings emerge controlling for unobserved individual \]acteristics or using instrumental variables to deal with the self-selection and endogeneity. Short migration stays in the US and frequent traveling provide return migrants no wage premium in Mexico.     

Computer knowledge and earnings: evidence for Australia

This paper uses data on wage and salary workers in Australia in 1993 to examine the relation between computer knowledge and earnings. A unique feature of the data set that is used is detailed information on the types and levels of computer skills possessed by individual workers. The main objectives of the study are to contribute to understanding the magnitude and sources of the relation between computer knowledge and earnings. Similar to existing research it is found that there is a large and significant return to computer knowledge, but that the magnitude of the return is substantially reduced in regressions that include detailed occupation controls. Using the detailed information on workers’ computer skills the main finding is that earnings are significantly positively related to the number of types of skills and average level of skills possessed by a worker.