长期期货合约与默契合谋:以电力市场为例

本文利用对称双寡头模型来研究电力市场长期期货合约对发电厂商竞争和合谋的影响。合约市场和现货市场是发电厂商进行电能交易的主要市场,发电厂商首先在合约市场和各自的买方签订一份长期期货合约,然后在现货市场展开竞争。在现货市场中,厂商可以进行价格竞争。也可以进行产量竞争。本文的研究结论表明,电力市场长期期货合约可以促进发电厂商之间的竞争,同时,也使得发电厂商之间维持默契合谋所要求的最低贴现率更高,从而使合谋的可能性更小。当然,本文的结论可以推广到电力市场以外的其他市场。     

The Non-equivalence Revisited: Staggered Price and Wage Contracts

Abstract

Staggered wage-setting and price-setting have frequently been used to construct business cycle models that can replicate long-lasting real effects of monetary shocks. We examine how the two seemingly equivalent sources of nominal rigidities compare in generating persistence in real output following monetary expansion. We show that staggered wage-setting is in general better able to generate persistence, because it can lower the procyclicality of marginal cost considerably more than staggered price-setting does.     

A Case of Sticky Floors: Gender Wage Differentials in Thailand

Using 2004 Household Socio‐Economic Survey data for Thailand, we explore the gender wage differentials across the entire unconditional wage distribution and find a strong sticky floor effect. Glass ceilings, although observed along with sticky floors in the raw data and pooled regressions, disappear in the counterfactual decompositions, suggesting a strong sticky floor pattern in gender wage differentials in Thailand. Whereas the evidence for most European countries points to glass ceilings, our findings for Thailand are qualitatively similar to those from other South Asian and Southeast Asian countries for which evidence exists; namely, Singapore, the Philippines and Sri Lanka.     

Nominal Wage Contracts, Adjustment Costs and Real Persistence of Monetary Shocks

This paper describes a model in which monetary shocks have persistent real effects. Starting from the limited participation model of Christiano (1991) with capital adjustment costs as suggested by Dow (1995) it is confirmed that costs of equipment installation and restrictions on consumer portfolio choices alone cannot account for the observed effects of monetary policy. However, after introducing nominal wage contracts as a third friction, the model generates real effects of monetary shocks. It is shown that these real effects are highly persistent for a realistic size of adjustment costs and strongly autocorrelated money growth shocks which are typical for Europe.     

Wage Compensation for Job Risks: the Case of Hong Kong

The paper provides an estimate of wage compensation for fatal job risk in Hong Kong. It uses the 1991 Population Census of Hong Kong merged with job fatality data collected by the Labour Department. The results show that there is a positive and significant compensating wage differential for job fatal risk for manual workers in Hong Kong. The estimated 'statistical value of a life' is approximately HK$10.8m in 1990 prices (about US$1.4m). While this figure is somewhat lower than many estimates for developed countries, it is much higher than workers' compensation.     

Decomposing Wage Gaps between Ethnic Groups: The Case of Israel

Past investigations of the income gaps between Jews and non-Jews in Israel treat non-Jews as one group. In this paper we separate the non-Jewish group into three main religious minorities: Muslims, Christians, and Druze and focus on the northern part of Israel, where most minorities live. Using the latest Israeli census, we find significant explained and unexplained income gaps in favor of Jews. The unexplained gaps tend to be larger the more educated the individual. Jews have much higher representation in the more lucrative occupations, and earn significantly more in them. Muslims generally suffer from the largest income gaps, while Druze have the lowest income gaps, reflecting direct and indirect benefits reaped from serving in the army. Among minorities, Christians are the most educated and most concentrated in the top occupations, which explains why they have the lowest gaps in the highest percentiles of the income distribution.     

数字治理下行政协议信息公开机制优化路径

数字治理助推行政协议信息公开的形式由线下扩容至线上,呈现出服务性、互动性、扩散性等特征。建立健全数字时代行政协议公开机制,既是数字时代的价值取向,也有着深刻的法律和现实动因。然而,作为全面建设数字法治政府的重要一环,行政协议信息公开机制却面临着法律规制亟待完善、公开渠道缺乏统筹、公众参与制度供给不足、主体权责存在脱节等多重困境。对此,要以规范支撑、渠道协同、制度供给、责任明确为着力点,优化数字时代行政协议信息公开机制。     

随机需求下供应链协调的联合契约模型研究

市场需求为随机需求且受零售价格与销售努力影响的条件下,讨论了三级供应链契约协调问题,设计了基于数量折扣契约和收益共享契约的联合契约模型.证明了通过合理设置契约参数,可以实现供应链整体利润的最优化和各成员利润的帕累托改进,并用一个算例分析了契约参数对供应链各成员利润的影响.     

Non‐compliance with the Minimum Wage Law when Completely New Minimum Wage Laws Are Established: The Case of South Africa

Abstract: Using the case of South Africa, we study compliance with the minimum wage law when completely new minimum wage levels are established. By even the best estimate, the compliance rate in South Africa would not exceed 40 per cent for the agricultural sector and 30 per cent for the domestic worker sector. The compliance rates by subpopulation groups reveal that the compliance rate is low where the cost to comply with the minimum wage law is high, implying that government inspections are not done where they are likely to have the highest payoff. However, if the government tries to enforce the policy more strictly, the poor/less skilled would be adversely affected.     

从工资差异到趋同:外溢的视角

本文从理论和实证两个角度集中回顾了工资外溢领域的相关文献。这一领域的理论主要从工资的同步决定和工资先后决定两个方向展开,前者以工会垄断模型为线索,后者重点研究工资决定的领导者-追随者模型。而实证研究主要讨论工资外溢的发生机制,集中在以下三个层面:行业之间、外资企业和内资企业之间以及私有部门和公共部门之间,主要结论如下:不同层面都存在工资外溢,而且工资外溢主要通过在相似的产品和劳动力市场的竞争以及出于制度或心理上的公平考虑而产生的嫉妒效应发生。文章联系中国已有的工资相互关联如工资攀比和趋同等以及长期存在的行业间工资差距持续扩大等现象,提出研究中国工资外溢的初步思路。     

The Wage Rate and the Worker's Productivity: the Case of the Japanese Chemical Industry

The purpose of this paper is to analyze the relationship between the wage rate and the productivity of the blue-collar worker in Japan. In this paper, micro data from a factory of chemical industry in Japan is used for our empirical study. Our empirical results indicate that, if the index of the labor productivity is an appropriate index of the labor productivity, the labor productivity plays a crucial role in the determination of the wage rate in a particular Japanese chemical factory of the 1960s.     

A Picture of Wage Inequality and the Allocation of Labor Through a Period of Trade Liberalization: The Case of Brazil

This paper constructs a picture of the labor market impact of trade liberalization in Brazil. We examine the level and dispersion of wages, the skilled wage premium, and employment composition before and after trade liberalization. After trade reform, there was a rise in the returns to college education which, since the share of college workers also rose, is attributable to rising demand. This change did not increase overall wage dispersion because of the small share of college-educated workers and because of decreasing returns to intermediate levels of education.     

Tacit Collusion in Price‐Setting Oligopoly: A Puzzle Redux

We study tacit collusion in price‐setting duopoly games with strategic complements and substitutes. While this problem has been considered by several studies, this article sheds new light on the comparison by focusing on the relationship between dynamic stability of equilibrium and tacit collusion. We find when controlling for the absolute slope of the reaction functions, there are no robust differences in either the convergence properties or tacit collusion between complements and substitutes treatments.     

最低工资文献综述

最低工资制度是国家通过立法的形式干预工资分配的一种制度,该制度设计是为了保障低收入劳动者,但是在实施中却引来了很多的争论。对此经济学家们分别从理论和实证的角度对实施最低工资的后果进行了分析。文章尝试对这些不同的观点进行梳理,以期能对最低工资的研究提供参考。     

Wage Consequences of Rapid Tertiary Education Expansion in a Developing Economy: The Case of Thailand

In recent years, Thailand has experienced the emergence of “overeducated” workers as the supply of university graduates in Thailand has outpaced growth in high‐skilled employment opportunities. Using the 2007 to 2009 Thai Labor Force Survey, this paper quantifies the incidence of overeducation and estimates overeducation wage penalties among male university graduates. The results show that the incidence of overeducation is greatest among younger cohorts. Quantile wage regression results suggest that overeducation wage penalties for older workers capture the impact of unobserved low ability on wages. In contrast, persistent wage penalties of 11–26% across the wage/ability distributions for younger workers are consistent with structural imbalances in the Thai labor market. These imbalances make it difficult for university graduates to find jobs commensurate with their level of formal education and to achieve their full earning power. The wage penalties are especially large for new entrants into the labor market.     

工资差距分解方法之述评

工资差距分解方法是一种非常重要的实证研究方法.本文对文献中出现的多种工资差距分解方法进行了系统的梳理,不仅讨论了各种方法的缺陷和使用范围,还说明了新方法和老方法之间的传承关系,以及新方法对老方法所做出的改进.本文涉及的分解方法有Oaxaca分解、Cotton分解、Neumark分解、Brown分解、Appleton分解和分位数分解等等.     

The Wage Elasticity of Labour Supply: A Synthesis of Empirical Estimates

Summary This paper performs a meta-analysis of empirical estimates of uncompensated labour supply elasticities. For the Netherlands, we find that an elasticity of 0.5 for women and 0.1 for men is a good reflection of what the literature reveals. The elasticity for men hardly differs between countries, but for women some cross-country variation is found. The increasing participation rate of women may lead to a somewhat lower elasticity in the future. Both the specification of the hours function and the estimation method are found to affect elasticity estimates.