21世纪中国农业水资源利用

一、中国水资源现状 (一)中国水资源供给 中国是一个水资源相对贫乏的国家。中国水资源年径流量仅为27110亿立方米,人均年径流量仅为2151立方米,比世界平均水平的1/4还要低。中国北部地区尤其缺水,人均年径流量仅为750立方米。海滦河流域水资源尤其匮乏,人均年径流量仅为355立方米,淮河、黄河流域稍高,但仍远低于国际可接受的1000立方米水紧张下限。     

The deployment of temporary production workers in assembly operations: a case study of the hidden costs of learning and forgetting

The dynamics of workforce skill levels has a considerable impact on plant-level performance that is commonly overlooked by managers of manufacturing operations. In this study, we present a discrete event simulation model inspired by and validated in an actual manufacturing setting that includes short product life cycles, mid-volume production quantities, and a production environment consisting of assembly, inspection and testing.The effect of worker skill dynamics is analyzed using a factorial experimental design that contrasts the use of temporary versus permanent workers on manufacturing cost performance. The manufacturing costs assessed include labor, inspection and testing. The cost of reworking a defect is captured as an increase in the labor consumption. Materials costs are not assessed. At the core of the analysis, it is assumed that temporary workers have relatively less skill and therefore have higher average production times, higher average defect rates associated with their assembly activity, and lower rates of learning. In addition, the variance of the production time is higher for the temporary workers. Despite these indicators of performance problems, temporary workers may be used because of the considerably lower wage rate compared to permanent employees.Our in-depth case analyses shows that assigning skilled permanent workers to upstream build operations was superior to other policies deploying temporary workers, regardless of lot size or product complexity. Attesting to the importance of the labor mix component of manufacturing strategy, workforce deployment policies tended to dominate product switching frequency (a proxy variable for lot size and product mix) in impacting costs.     

French trade unions: crisis in the 1980s

France has had a Socialist President since 1981, and yet support for French trade unions has declined markedly. This article assesses the nature of this decline and examines the role of government, changes in the labour market, employer policies and trade union strategies, in order to explain this apparent paradox.     

THE CHANGING RISK PROFILE OF U.S.-BASED MULTINATIONAL CORPORATIONS EXPOSED TO EUROPEAN COMMUNITY MARKETS

In this study we investigate the risk characteristics of U.S.-based multinational corporations (MNCs) that conduct much of their business in the European Community. Specifically, we assess the efficacy of a multifactor return-generating model that incorporates the influence of U.S. and European markets. Our results demonstrate that the European market is a significant factor in explaining the time-series behavior of MNC returns, and that the European market influence is stronger since the adoption of the Single European Act. In addition, the reduction in the sensitivity of MNCs to the U.S. market since the Single European Act is cross-sectionally associated with changes in their proportional levels of European sales. The results suggest that the returns of other MNCs expanding into increasingly integrated regional blocs may experience similar changes in their systematic risk profile.     

From Experience: New Idea Enhancement at Amoco Chemical: An Early Report from a New System

Amoco Chemical Company operates the New Ideas Process (NIPr) as its innovation support system for employee ideas generated outside formal business development channels. The system's goal is to operate a process that involves employees in the identification and initial development of ideas for new business opportunities for the company. Jeff Felberg and David DeMarco describe NIPr's basic philosophy, procedures, organization, and staffing. Additionally, they provide quantitative and qualitative results from the first four years of the system's operation for the areas of employee involvement, business concept development, production of funded ideas, and cultural enrichment of the company.     

Pensions: the voluntary growth of participation*

In spite of the deepening of the economic recession, the issue of employee participation or industrial democracy has not disappeared from the political or industrial agendas. This article, which reports the findings of a two year UK study at Glasgow University, examines one area of survival—employee participation in the management of pension schemes.     

Consolidation in the financial services industry: Are there industry gains for acquisitions of security firms?

We examine the revaluation of target security firms, their respective acquirers, both banks and non-banks, and their corresponding rivals before and after the major consolidation wave of 1994 to 1997. We find that target security firms as well as their respective acquirers are favorably revalued at the time of their acquisitions. The valuation effects are more favorable for non-bank acquirers and for acquirers with more growth potential and a lower degree of financial leverage. This suggests that investors expect greater synergies for mergers by better capitalized, faster growing, non-bank acquirers. In contrast to previous merger studies that generally find negative wealth effects for acquiring firms, cumulative abnormal returns (CARs) are on average positive for acquirers, targets, and portfolios of competing security firms, with the highest positive CARs for targets.