Minimum wages and poverty with income-sharing

Textbook analysis tells us that in a competitive labor market, the introduction of a minimum wage above the competitive equilibrium wage will cause unemployment. This paper makes three contributions to the basic theory of the minimum wage. First, we analyze the effects of a higher minimum wage in terms of poverty rather than in terms of unemployment. Second, we extend the standard textbook model to allow for income-sharing between employed and unemployed persons in society. Third, we extend the basic model to deal with income sharing within families. We find that there are situations in which a higher minimum wage raises poverty, others where it reduces poverty, and yet others in which poverty is unchanged. We characterize precisely how the poverty effect depends on four parameters: the degree of poverty aversion, the elasticity of labor demand, the ratio of the minimum wage to the poverty line, and the extent of income-sharing. Thus, shifting the perspective from unemployment to poverty leads to a considerable enrichment of the theory of the minimum wage.      

西方发达国家实施工作分享制对我国的启示

研究西方工作分享的理论及其对就业产生的积极影响,并进一步研究我国目前劳动力绝对过剩造成的失业问题。通过研究认为,实施工作分享有助于缓解目前我国严峻的就业形势,并探索我国实行工作分享制的形式。     

冗员失业、社会负担与国有企业效率

影响国有企业效率的因素有很多,其中制度因素最为重要。而在传统的国有企业制度下,冗员失业和社会负担又是制约企业效率提高的关键。时至今日,这个问题仍是国有企业进行减员增效改革、实施战略性重组的最大障碍。从理论上研究冗员失业对企业效率的影响,并结合我国实际情况分析社会负担给国有企业造成的压力,以强化社会保障为突破口,提出解决冗员失业和社会负担问题、提高国有企业效率的具体对策。     

Unemployment and mental health among white‐collar workers – a question of work involvement and financial situation?

We examine whether it is a psychosocial or an economic need for employment that affects mental health among the unemployed. The relevance of both aspects are examined, concentrating on two measures of each dimension. Two perspectives of work involvement – the degree of connection to working life and the perceived employment commitment – and two perspectives on financial situation – economic security and perceived economic concern – have been analysed, using empirical data collected by means of a cross-sectional survey of 1297 unemployed white-collar workers from the public sector in Sweden. The degree of connection to working life was not significantly linked to the mental health of the unemployed, although there was a strong link between the perceived employment commitment and mental health among this group. The stronger the perceived employment commitment, the poorer the state of the person's mental health. Perceived economic concern was also tightly linked to mental health: the greater the economic concern, the poorer the mental health. Economic security also played – at least, partly – a moderate but significant role. The results provide strong support for the existence of both a psychosocial need and an economic need for employment. The analysis demonstrates that it is the perceived assessed measures of work involvement and financial situation that are linked to mental health.     

Exploring Parameter Relations for Multi‐Stage Models in Stage‐Wise Constant and Time Dependent Hazard Rates

Single cohort stage‐frequency data are considered when assessing the stage reached by individuals through destructive sampling. For this type of data, when all hazard rates are assumed constant and equal, Laplace transform methods have been applied in the past to estimate the parameters in each stage‐duration distribution and the overall hazard rates. If hazard rates are not all equal, estimating stage‐duration parameters using Laplace transform methods becomes complex. In this paper, two new models are proposed to estimate stage‐dependent maturation parameters using Laplace transform methods where non‐trivial hazard rates apply. The first model encompasses hazard rates that are constant within each stage but vary between stages. The second model encompasses time‐dependent hazard rates within stages. Moreover, this paper introduces a method for estimating the hazard rate in each stage for the stage‐wise constant hazard rates model. This work presents methods that could be used in specific types of laboratory studies, but the main motivation is to explore the relationships between stage maturation parameters that, in future work, could be exploited in applying Bayesian approaches. The application of the methodology in each model is evaluated using simulated data in order to illustrate the structure of these models.     

冲击型负荷下的生产存储模型研究

建立了考虑冲击需求、变化生产率的最优生产存储库存策略. 其特点是:把一个生产周 期分为多个生产阶段,各个生产阶段时间可以不同;在每个生产阶段中,允许生产率小于需求 率,允许提前生产;而且,最大生产率要小于最大需求率. 研究发现,为满足冲击需求,提前存储 较多而启动机器数量较少,或提前存储较少而启动机器数量较多,不一定能够取得最佳效益, 要根据存储费用和启动费用共同确定. 在有限生产率的条件下,得出一种寻求最优生产- 库存 策略,为此类库存系统的管理决策提供了理论依据.     

价格持续期的非对称对数ACD模型及其应用

通过建立两状态价格持续期的非对称对数ACD模型,刻画价格持续期过程对不同价格状态的不对称依赖关系和对未预期到的短价格持续期冲击与未预期到的长价格持续期冲击的不对称响应过程,并在该模型中引入买卖价差和交易规模变量,检验市场微观结构理论相关假说。模型拟合结果表明,价格上升和价格下降两种状态对价格持续期的影响不同,未预期到的短价格持续期冲击对价格持续期有正面影响,而未预期到的长价格持续期冲击对价格持续期有负面影响;对市场微观结构信息模型的实证分析表明,滞后买卖价差和滞后交易量具有信息含量,它们与价格持续期显著负相关;隐藏交易假说没有得到实证的支持,在选取样本中大规模交易量比中等规模交易量对价格持续期有更加显著的影响。     

Equal opportunities,true options or hidden unemployment? A comparative perspective on labour‐market marginality

Previous studies have shown that women generally adjust to unemployment better than men. This study shows that young women value work equally as highly as men, and have negative feelings when unemployed, which indicates the existence of a closed gender gap. However, children have a different influence on men's and women's unemployment experiences. Being a parent increases job-search activity and work involvement among men. On the other hand, children moderate negative experiences of unemployment among women, and they decrease their job-search activity and work involvement. Being a parent increases labour-market marginality among young unemployed women. For young men it is a motivational factor for searching for and getting a job. The comparison shows furthermore that patterns of re-employment vary in the involved countries: Denmark, Finland, Iceland, Norway, Sweden and Scotland. They reflect differences in the overall unemployment situation in the countries and the welfare strategies applied.     

试论保证合同的保证期间与诉讼时效

保证期间是债权人应当积极行使权利 ,使保证权利从期待权利变为现实权利的期间 ,其性质既不是诉讼时效 ,也不是除斥期间 ,是一特殊的权利行使期间。保证期间与诉讼时效性质不同 ,可以同时适用于保证合同 ,但在规范上不能存在冲突。