钢铁生产物流工艺过程监测与控制系统设计与实现

文章运用生产物流管理的思想和方法,阐释钢铁生产物流工艺过程的特点、监控的问题和原因,提出建立物流仿真系统和物流自动化技术设计方案,有效实现钢铁生产物流工艺过程的监测与控制手段,对现代钢铁生产物流工艺过程的科学管理具有重要的指导价值。     

A WARM EMBRACE OR THE COLD SHOULDER? WAGE AND EMPLOYMENT OUTCOMES IN ETHNIC ENCLAVES

This paper examines how immigrant enclaves influence labor market outcomes. We examine the effect of variation in ethnic concentration across counties and county subdivisions on both immigrant earnings and employment using the non‐public use, 1‐in‐6 sample of the 2000 U.S. Census. We find that there is heterogeneity in enclave impacts by ethnic group and skill composition of the enclave. While some groups tend to suffer from lower wages and employment propensities when residing in areas with larger ethnic concentrations, others have higher wages and improved employment opportunities in enclaves. (JEL J61, J15, R23)     

THE GENDER WAGE GAP: WHAT HAS HAPPENED BETWEEN 1973 AND 1990 IN AUSTRALIA?*

The current study examines the change in the gender wage gap in Australia over the period 1973 to 1990. The Juhn, Murphy and Pierce (1991) decomposition is used in order to evaluate the role and relative contribution of changes in observed and unobserved skills and their prices. The sensitivity of conclusions to the measure of labour market experience and industry and occupation structure are also examined. The analysis concludes that gender-specific effects are dominant in male-female wage convergence although wage-structure effects also play a minor role.     

How Does Using a Mobile Device Change Investors’ Reactions to Firm Disclosures?

I examine how characteristics of investors’ information access tools change investors’ reactions to firm disclosures. I examine my research question in the context of information choice (i.e., allowing investors to choose the order of information and sections to read within a disclosure) and spatial layout (i.e., how information is displayed when viewing the disclosure). Results of an experiment are consistent with information choice improving investors’ judgments if the disclosure is viewed on a computer screen. Conversely, and consistent with cognitive overload, information choice harms investors’ judgments if the disclosure is viewed on a smaller screen, such as that of a mobile device. Follow-up experiments show that changing the disclosure presentation to reduce the need to scroll is one way to improve investors’ judgments on a smaller (or mobile) screen. My findings caution firms and regulators about expanding information choice within disclosures without considering the screen size used to access the disclosure.     

社会资本与农村社区生态环境保护

社会资本是农村生态环境保护的基石,它可以打破生态环境保护中的“囚徒困境”,促使人们遵守生态环境保护的相关规则,解决人们在生态环境保护中的利益冲突,以及抵御外来污染转嫁。当前,由于城市化进程的加快以及市场、政府力量等向社区的渗透,我国农村社区中社会资本正面临流失的危险,这是农村生态环境恶化的重要原因。社会资本流失只是一种暂时现象,它可以在现代农村社区中得以重构与再生,这种重构与再生,沿袭的是一种价值理性与工具理性相结合的路径。