A MODEL OF MONOPOLISTIC COMPETITION WITH PERSONAL INCOME DISPERSION

We introduce non‐homothetic preferences in the Dixit–Stiglitz model of monopolistic competition, and enquire about the effects of a change in income dispersion on the firms’ optimal decisions and market equilibrium. Income dispersion, modeled as a mean preserving spread, is shown to affect only the degree of product differentiation under the standard negligibility hypothesis on the firms’ decision making process, while it generates a positive co‐movement of demand and demand elasticity, when this assumption is removed and the price index effect is taken into account.     

IS LABOUR MARKET FLEXIBILITY DESIRABLE OR HARMFUL? A FURTHER DYNAMIC PERSPECTIVE

A common belief of mainstream economics as well as underpinning government policy is that the more flexible real wage is, the lower is unemployment. In this paper we study the dynamics of a standard neoclassical labour market under the simplest Walrasian adjustment rule. We show that when consumption and leisure are sufficiently low substitutes, an increase in real wage flexibility may destabilize the unique Walrasian equilibrium of the economy, triggering fluctuations in wages and employment. Minimal departures from strict (Walrasian) neoclassical equilibrium modelling are required to obtain instability results for wage flexibility.     

Growth,income distribution and unemployment in a two-sector economy

We build a two-sector general equilibrium growth model with capital-intensive consumption goods and a labour-intensive investment goods sector to investigate the coexistence of growth and unemployment. The model uses heterogeneity in saving behaviour, introduces an effective demand problem, has full employment of capital with input non-substitutability and shows that the aggregate labour employment is determined by available capital along with commodity market equilibrium. The long-run growth may not be balanced, and under biased growth, the level of unemployment may monotonically increase or decrease over time, or may first increase (decrease) and then decrease (increase). Such possible unemployment paths help us tightly define “jobless growth”.     

International competition, downsizing and wage inequality

A country with Cournot competition and free entry experiences an increase of its market size either due to economic growth or international integration of its goods markets. This implied increase in competition leads to shrinking mark-ups and forces firms to reduce overhead costs relative to output. This implies a reallocation at the aggregate level from administrative to productive activities. Relative factor rewards change and wage inequality increases. The factor which loses in relative terms can even lose in real terms. From a quantitative perspective, international competition is demonstrated to be the more plausible cause of rising wage inequality.     

Supply-side strategic unemployment in small business

In this paper, the model which will be analysed is characterized by a labour market with (a) profitable vacancies, (b) unemployment, (c) excess labour supply, (d) limited mobility and divisibility of labour, and (e) competition on-the-job. The analysed setting is typical for a small-business economy. The analysis suggests that unemployment will be greater than equilibrium unemployment if present employees and potential entrants consider job assignments for this market under strategic perspectives.     

Can labour market institutions mitigate the China syndrome? Evidence from regional labour markets in Europe

This paper investigates how labour market regulations alter the adverse impact of rising import competition from China in European local labour markets between 1997 and 2006. The paper constructs measures of regional exposure to Chinese imports based on previous literature and on regional labour market frictions exploiting involuntary labour reallocations. Taking into account the endogeneity of import competition and its interaction with labour market regulations, the paper finds that regions more exposed to the rise of China have suffered from a reduction in manufacturing employment shares. This shock grows larger with regional labour market frictions; hence, it exacerbates the impact of trade shock on employment. Moreover, the paper finds that employment in public services, and not in construction or private services sector, absorbed the negative shock to the manufacturing sector. The unemployment rate, the labour force participation rate and wages in all sectors are unresponsive to import competition from China.     

Good jobs, bad jobs, and trade liberalization

How do labor markets adjust to trade liberalization? Leading models of intraindustry trade (Krugman (1981), Melitz (2003)) assume homogeneous workers and full employment, and thus predict that all workers win from trade liberalization, a conclusion at odds with the public debate. Our paper develops a new model that merges Melitz (2003) with Shapiro and Stiglitz (1984), so also links product market churning to labor market churning. Workers care about their jobs because the model features aggregate unemployment and jobs that pay different wages to identical workers. Simulations show that, for reasonable parameter values, as many as one-fourth of existing “good jobs” (those with above average wage) may be destroyed in a liberalization. This is true even as the model shows minimal impact on aggregate unemployment and quite substantial aggregate gains from trade.     

Compensating Differentials for Dangerous Work in a Labour Discipline Model

Wage compensation for occupational risk in Walrasian models has three properties: it generates efficient levels and allocations of risk, it enables workers in dangerous jobs to be just as well off, ceteris paribus, as workers in safe jobs, and it permits the estimation of willingness to pay schedules for safety from labour market data. This paper tests the status of these three properties under a simple model in which variable labour effort is induced by wage–safety rents and the threat of dismissal. It finds that all three must be modified, and that these results are robust over alternative specifications of labour market structure, the cost of providing safety, and the specification of the production function. The implications of this analysis are considered for both public policy questions and the interpretation of wage–risk studies.     

规模经济、城市化和经济聚集

城市化和经济聚集是现代区域经济理论关注的核心问题。然而由于城市化现象所反映的规模收益递增因素与新古典经济的竞争性均衡不相容,因此,城市化问题很难在新古典经济学的框架内得到解释。这样,长期以来标准的经济分析很少关注经济聚集现象和城市的形成。直到20世纪70年代,迪克西特和斯蒂格利茨把垄断竞争问题重新引入到主流经济学后,垄断竞争模型才成为处理规模收益问题的有力工具,新经济地理也由之发展而来;与此同时,新兴古典经济学以超边际分析为工具深入分析了分工对城市形成和产业迁移的影响。     

Structural Reforms and Labour‐market Outcomes: International Panel‐data Evidence

This paper explores the impact of structural reforms on a comprehensive set of macro‐level labour‐market outcomes, including the unemployment rate, the average wage index, and overall and female employment levels and labour force participation rates. Together, these outcome variables capture the overall health of the labour market and the aggregate welfare of workers. Yet, to our knowledge, there seems to be no other comprehensive empirical investigation in the existing literature of the impact of structural reforms at the cross‐country macro‐level on labour‐market outcomes other than the unemployment rate. After documenting the average trends across countries in the labour‐market outcomes up to 10 years on either side of each country's structural reform year, we run fixed‐effects ordinary least squares and instrumental variables regressions to account for the likely endogeneity of structural reforms to labour‐market outcomes. Overall, the results suggest that structural reforms lead to positive outcomes for labour. Redistributive effects in favour of workers, along the lines of the Stolper‐Samuelson effect, may be at work.     

Neoclassical theories of stationary relative prices and the supply of capital

In the traditional versions of the neoclassical theory of value and distribution, the stock of existing capital, understood as either an amount of value or an endowment of capital goods, was taken as given together with the available quantities of labour and natural resources. This characteristic of the early neoclassical theories is analysed through comparison with the modern neo‐Walrasian models of stationary equilibrium, where the stock of capital is not among the givens. It is shown here that the attempt to present capital as a factor of production on a par with labour and land led the early neoclassical authors to write the zero‐net‐accumulation condition, which was required by the stationarity of relative prices, in the form of a market‐clearing condition for the supply of and demand for capital. The rate of interest was therefore understood as the price determined by this market. As is known, however, the view of capital as a factor of production and the rate of interest as the price for its use failed to work and involved several problems, some of which are discussed here.     

Efficiency wages,unemployment and international factor movements

This paper examines the implications of unemployment resulting from efficiency wages for international factor movements in a standard Heckscher-Ohlin model where the relative size of the endowments of skilled and unskilled workers and the efficiency wage induced unemployment level in the unskilled labour market are simultaneously determined given the population, supply of capital and its distribution in the economy. Capital in the economy is used only to train individuals for the skilled labour market, where workers are fully employed. It is shown that the optimum labour inflow in the market with domestic distortion and the optimum capital inflow are always positive because they reduce the severity of distortion by raising employment and income for the residents. The income and employment of foreigners also increase. Under this situation the optimum labour or capital outflow on the other hand is always zero. These conclusions directly contradict the result obtained for international factor movements in the presence of exogenously determined unemployment.     

Efficiency wages,unemployment and international factor movements

"This paper examines the implications of unemployment resulting from efficiency wages for international factor movements in a standard Heckscher-Ohlin model where the relative size of the endowments of skilled and unskilled workers and the efficiency wage induced unemployment level in the unskilled labour market are simultaneously determined given the population, supply of capital and its distribution in the economy.... It is shown that the optimum labour inflow in the market with domestic distortion and the optimum capital inflow are always positive because they reduce the severity of distortion by raising employment and income for the residents. The income and employment of foreigners also increase. Under this situation the optimum labour or capital outflow on the other hand is always zero. These conclusions directly contradict the result obtained for international factor movements in the presence of exogenously determined unemployment."     

Germany’s stake in exchange rate stability

The position taken by politicians and important pressure groups in Germany concerning EMU will depend to a large extent on its labour market implications—and thus on the (perceived) impact of exchange rate variability on employment and unemployment. Most economists would assume this impact to be minor. The purpose of this paper is to show that this presumption might be wrong.     

Sectoral shifts Impact on Hong Kong workers

This paper documents the accelerating rate of economic transformation in Hong Kong during the 1980s and its impact on the labour market. Earnings in expanding sectors have risen faster than earnings in declining sectors. The magnitude of the effect, however, is small and variable. Sectoral shifts have also had negligible effects on aggregate unemployment and unemployment in declining sectors. It is found that the degree of earnings inequality has increased contemporaneously with the rising rate of economic transformation. The earnings of less well-educated workers have fallen relative to other workers. The earnings of elderly workers, however, have not fallen relative to other workers. The reallocation of labour from low-wage sectors to high-wage sectors has resulted in a substantial growth in earnings for most workers involved.     

Wages,Health Insurance Benefits,and Worker Sorting Under Asymmetric Information

Abstract

Employer-sponsored health insurance is the single largest source of health insurance in the USA. In this paper, we explore a model that treats a firm as a de facto insurance company. More specifically, we model a firm as both a producer of goods for an output market and a health insurance company for their employees. The model accounts for the joint provision of wages and health insurance, including the possibility of asymmetric information in employee health status. With this structure, a firm can choose to pay their workers in some combination of cash wages and health insurance. We characterize optimal employment contracts and show that the Rothschild–Stiglitz model results under asymmetric information extend to employer provided insurance. We also find that employment-based insurance offers pooling options that are typically not available when insurance is sold as a standalone product, suggesting a stability to employer-based insurance that is not dependent on the tax system.     

Country size and trade in intermediate and final goods

This paper documents a negative relationship between country size and the share of final consumption goods in total exports. A model is developed, based on the division of labour and comparative advantage, to explain this relationship. Labour is used to produce traded intermediate inputs which are used in the production of traded final goods. Large countries gain relatively more from comparative advantage than from the division of labour, while the opposite is true for small countries. As in the data, large countries export a smaller share of final goods and a larger share of intermediate goods than small countries. It is shown that the model developed in the paper yields the same results as a model based on monopolistic competition.     

Impact of international trade on unemployment under oligopoly

By studying a two-sector general equilibrium model in which firms engage in oligopolistic competition and unemployment is a result of the existence of efficiency wages, we derive the following results analytically. A country's comparative advantage in producing manufactured goods increases with the level of efficiencies in the labor market. The opening of international trade leads to the equalization of wage rates even though countries differ in their factor endowments and labor market efficiencies. If countries have the same level of labor market efficiencies but differ in their endowments of labor and land, the opening to international trade leads to an increase in the wage rate in both countries.     

The NAIRU,Aggregate Demand and Investment

The nature of the non‐accelerating inflation rate of unemployment (NAIRU) is analysed. The focus of our analysis is the role of aggregate demand and capacity in the context of the NAIRU. Two aspects of the relationship between the level of aggregate demand and the NAIRU are of particular significance. First, it is argued that the real wage–employment relationship based on enterprise decisions cannot be fully articulated without reference to the level of aggregate demand. Second, a model which allows for variable returns to labour and the notion of full capacity is used to explore the effects of shifts in the capital stock on the real wage–employment relationship. The model is specifically used to explore whether a sufficiently expansionary environment can generate sufficient investment to shift that relationship until the NAIRU is compatible with full employment. A number of limitations on the conclusions reached are considered, and the policy implications are briefly considered.     

Labour market policies in the western industrialised countries

The longer the high levels of unemployment continue in western countries the greater is the discussion about a policy aimed at reducing unemployment which is independent of general counter-cyclical and growth policies. What type of labour market policy measures have been adopted up to now in these countries?