Virtually No Effect? Different Uses of Classroom Computers and their Effect on Student Achievement

Most studies find little to no effect of classroom computers on student achievement. We suggest that this null effect may combine positive effects of computer uses without equivalently effective alternative traditional teaching practices and negative effects of uses that substitute more effective teaching practices. Our correlated random effects models exploit within‐student between‐subject variation in different computer uses in the international TIMSS test. We find positive effects of using computers to look up information and negative effects of using computers to practice skills, resulting in overall null effects. Effects are larger for students with high socioeconomic status and mostly confined to developed countries.     

Motivations and barriers of foreign R&D activities in China

The continued growth of the Chinese economy accompanied with the expansion of international investment in China has led to an increase in foreign research and development (R&D) activities in the country. Aside from the rising importance of R&D internationalization, research on foreign R&D in China has been neglected in the past due to its emerging status. In this article we examine drivers and barriers for conducting R&D in China. The focus of our research is on transnational companies typically characterized by decentralized R&D activities. Our research is mainly based on qualitative interviews with senior R&D managers. The success of foreign R&D activities in China strongly depends on the realistic estimation of its advantages and the proper identification and handling of barriers.     

发展现代物流开掘新的利润源

随着经济的全球化，现代物流业在国内已逢勃发展，通过大量的资料和数据，说明了现代物流业已成为国民经济的重要支撑点，是新的“利润源泉”，指出了我国如何加快现代物流业的举措。     

高高在上的尊严

夜晚的绕城公路上，两三名“交警”拦下一辆外地牌号的轿车，制服、警帽、罚单甚至配枪，一应俱全，几名“人民卫士”俨然在秉公执法于一个交通违规事件。车，被“顺理成章”地扣留。几天之后，当车主带着扣车凭证前往车管所领车的时候，揭开了一场几地连锁的冒充交警扣车骗车的案件序幕。这是发生于广东省的一桩大型诈骗案件，涉及范围广及东莞、肇庆、深圳等多处。在警方严密配合下，几经展转周折，案件终究告破。