Konjunkturschlaglicht: Revidierte Erwerbstätigenzahlen

Ohne Zusammenfassung     

神经网络在实验室检测工作质量管理及控制中的应用

对实验室检测工作质量中存在的风险因素进行研究,形成风险评价指标体系,并运用BP神经网络建立风险分析评价模型,对风险评价指标进行量化评价,最终获得量化的实验室整体检测工作质量风险数据,为实验室有效管理提供科学决策依据。     

Flat Earth Economics: The Far-reaching Consequences of Flat Payoff Functions in Economic Decision Making

Economists tend to emphasize the optimum, but in many cases, even large deviations from optimal decisions make little difference to the payoff. This has far-reaching implications that are under-recognized, including: ( a ) decision makers often have a wide margin for error in their production planning decisions, and flexibility to pursue factors not considered in the calculation of payoffs; ( b ) optimizing techniques are sometimes of limited practical relevance for decision support; ( c ) the value of information used to refine management decisions is often low; and ( d ) the benefits of using "precision farming" technologies to adjust production input levels are often low.     

Food shopping and town centre vitality: exploring the link

Retail decentralization is associated with town centre decline and a concern for revitalization. Using the case of Llanelli, South Wales, the effects of a new food superstore on shopping behaviours and opinions are explored. Surveys in 1997, 1999 and 2001 reveal a dramatic change in patterns of food shopping, but no real change for purchases of clothing or DIY goods. Disadvantaged consumers, the carless and the elderly, were already heavily reliant on town centre shops before the opening of the new superstore and changes in their shopping patterns were no different from other shoppers. The 'social' vitality of the town centre increased, as did shoppers' satisfaction with town centre shopping, but major spin-off shopping or 'economic' vitality has not yet occurred.     

The Second CIIE:Increase Confidence for China-World Co-Development

The second CIIE(China International Import Expo)finished in Shanghai on November 10,2019.The second CIIE reached a total of tentative deals worth USD 71.13 billion,up by 23%from previous year.China’s opening-up measures and improving business environment have provided fresh opportunities for countries of the world and enhanced the world confidence to develop with China.     

Service worker role in encouraging customer organizational citizenship behaviors

Assessment of the role of the individual service worker in encouraging customer organizational citizenship behaviors (customer OCBs) is the primary focus of this paper. The researchers investigate this topic empirically across three service contexts. Customer OCBs are voluntary, outside of the customer's required role for service delivery, which provide help and assistance and are conducive to effective organizational functioning. In this paper, commitment to the service worker is the strongest predictor of customer OCBs. Further, personal loyalty to the service worker serves as a partial mediator of the effects of perceived benevolence of the service worker and commitment to the service worker on customer OCBs. Finally, theoretical, managerial and future research implications are included.     

A reappraisal of the forecasting performance of corn and soybean new crop futures

Forecasting performance of December corn and November soybean futures contracts during the previous spring was evaluated using the commonly specified price-level and percent-change models. These models invoke different assumptions regarding stationarity. Using Stein's analytical framework, results for the price-level model suggest avoidable social loss existed in the soybean market since 1973, because November futures provided biased forecasts. Regression R²s for both corn and soybeans declined substantially between 1952–1972 and 1973–1997, suggesting total social loss increased. By contrast, results from the percent-change model suggest only unavoidable social loss existed in the corn and soybean markets, because the futures provided unbiased forecasts. R² increased for corn but declined for soybeans, suggesting unavoidable social loss declined for corn, but increased for soybeans. The important, conflicting nature of the results from the two models underscores the importance of examining alternative model specifications when evaluating price forecasting performance. © 1999 John Wiley & Sons, Inc. Jrl Fut Mark 19: 604–618, 1999