Trust and development

In this paper we examine linkages between social trust and economic development using, for the first time, a panel of data. We confirm earlier cross-sectional studies finding that trust is a significant factor in development and also show for the first time that trust significantly interacts with both investment in physical and human capital. We provide a robustness analysis of our results via a set of jackknife experiments on our main equations, and the trust coefficients and interactions are very tightly distributed, indicating that the results are not highly sample dependent. We also consider whether trust directly influences investment and find that in a panel framework it does not unless we allow for a trust–education interaction in the investment equation.     

农业劳动力老龄化对生计效率的影响

目的 随着农业劳动力老龄化问题日益加剧，农户家庭生计资本和生计产出结构也发生了显著的变化。文章主要探讨农业劳动力老龄化对生计资源要素配置的影响及作用机理，进而为缓解农业老龄化危机、提高农户的自我发展能力提出合理化建议。方法 基于2021年陕南秦巴山区农户实地调研数据，运用DEA-Tobit二阶段模型验证二者之间的关系。结果 （1）陕南秦巴山区农户生计效率的规模效率最高，纯技术效率略低于规模效率，综合效率最低。大部分农户生计活动呈现规模收益递减状态，生计产出的增长低于生计投入的增长。（2）农业劳动力老龄化抑制了生计效率的提高，且在低收入水平家庭和户主低受教育程度家庭表现更为明显。（3）农业资金投入的增加能够缓冲农业劳动力老龄化对生计效率的负向影响。结论 因此，要正视农业劳动力老龄化现象，引导农户合理配置生计资源，提高农业资金投入使用效率，促进农户家庭自我发展能力。     

国民财富变化与可持续发展

当代的经济学家认为可持续发展就是创造、保持和管理财富的过程。结合1995~2005年的国民财富变动数据，分析当前世界与中国的国民财富变化特征，可以从变化中对当前世界不同发展程度国家及中国的可持续发展现状做出评价。     

人力资本与大学生就业——基于2010年对北京18所高校毕业生的调查

综合素质作为人力资本的核心体现,总体上不能提高就业概率,就业意愿和就业行为有助于展示人力资本价值,可提高就业率。与2008年相比,2010年综合素质和就业行为对大学生就业的作用减弱,就业意愿的作用增强,在一定程度上支持了"读书无用论"的观点,这会打击人力资本投资的热情,导致"弃考"、"弃学"现象,并最终影响国民素质的提高和经济的可持续发展。因此,要高度重视大学生就业问题。首先,要完善大学生就业机制,促进高素质人才顺利就业。打破体制性分割,建立全国统一的劳动力市场体系,提高社会保障的统筹层次,并加强就业服务与指导,减少交易成本,促进双方匹配。其次,要加强市场监管,规范信息发布、面试、录用等环节,确保透明、公开、公平,让拥有真才实学的优秀大学生脱颖而出。再次,要从创业教育、创业指导、创业资金等方面扶持更多的大学生创业,开辟一条"增量型"就业之路。     

PTE,innovation capital and firm value interactions in the biotech medical industry

Unlike previous studies which only focus on the main effect between IC and FV, this research includes PTE with the gap of resource-based view. IC is a key element in creating a competitive advantage, as it has a great influence on FV. A company may put relatively less into IC if it demonstrates higher efficiency. However, previous studies have neglected the fact that relative efficiency and IC affect FV and stock returns directly and indirectly. The research period was from 2006 to 2010 and the main research methods include HRA and DEA. The main research findings include the following. (1) There is a space for improvement in terms of the total technical efficiency. (2) PTE has a significant moderating effect between IC and FV. (3) IC and PTE have a significant influence on FV. (4) Apart from PTE and stock returns, IC and FV show significant differences within the sub-industry.     

The role of social capital in encouraging residents' pro-environmental behaviors in community-based ecotourism

This study integrated the theoretical perspective of social capital into community-based ecotourism (CBET). Two destinations were selected to test the conceptual model to see whether social capital improves cooperation between community residents and the coordination of CBET development, and whether its role is persuasive and encourages residents' pro-environmental behaviors. The sample consisted of 420 residents living in two typical ecotourism destinations in China. Findings from a two-stage structural equation model analysis show that economic benefits have a direct impact on residents' pro-environmental behaviors; and the cognitive, rather than structural social capital has a partially mediating effects on this relationship. These findings indicate that a high level of social capital, particularly the cognitive variant, is instrumental in encouraging residents' pro-environmental behaviors.     

Assessment of non-recurrent congestion caused by precipitation using archived weather and traffic flow data

Since precipitation has a negative impact on traffic congestion, there have been various studies for modeling the relationship between precipitation and its impact on traffic flow. However, due to limitations on existing data, none of the previous studies have accounted for the estimation of the total delay caused by precipitation. The objective of this study is to estimate the non-recurrent traffic congestion on freeways caused by precipitation. To accomplish this objective, archived weather and traffic data for the year 2008 from the Korean Freeway Systems was collected and analyzed. As a result, non-recurrent traffic congestion was about 1.6 million vehicle-hours due to rainfall and 186,000 vehicle-hours due to snowfall in 2008. In addition, simple analyses were performed to describe the average non-recurrent traffic congestion per unit distance as a function of precipitation and a function of the time period of precipitation. Although precipitation events might not be handled by human efforts, these results will assist in making strategic plans such as active speed management and contingency planning for mitigating traffic congestion due to precipitation.     

The Sophisticated and the Simple: the Profitability of Contrarian Strategies

A variety of variables have been used to form contrarian portfolios, ranging from relatively simple measures, like book‐to‐market, cash flow‐to‐price, earnings‐to‐price and past returns, to more sophisticated measures based on the Ohlson model and residual income model (RIM). This paper investigates whether: (i) contrarian strategies based on RIM perform better or worse than those based on the Ohlson model; (ii) contrarian strategies based on more sophisticated valuation models (e.g. Ohlson and RIM) perform much better than the relatively simpler ranking variables that have been used so extensively in the finance literature. Given that the RIM and Ohlson models require greater information inputs and technical know‐how, and make different implicit assumptions on future abnormal earnings, it is important to ascertain if they offer significantly greater contrarian profits to outweigh the increased costs that they entail. Indeed, our surprising finding is that simple cash flow‐to‐price measures appear to do almost as well as the more sophisticated alternatives. One would have expected the sophisticated models to significantly outperform the simple cash flow to price model for the reasons given by Penman (2007) .     

围绕首都经济发展创新北京高职教育

高等职业教育具有区域性、服务性、职业性和开放性的显著特点,强调以服务于区域、行业经济和社会发展为主旨。北京高职教育必须适应首都经济发展的需求,围绕首都经济发展的特色定位,创新北京高职教育的办学模式和人才培养模式,彰显北京高职教育的特色。     

风险投资在促进创新型中小企业成长中的作用

风险投资家不仅为创新型中小企业提供了股本支持,而且还运用自身丰富的管理经验、专业能力及社会网络,向创新企业家提供其所缺乏的管理服务。风险投资这一创新的投资方式,使其成为推动创新型中小企业发展的不可替代的力量。要发挥风险投资在推动创新型中小企业发展中的巨大作用,必须遵循风险投资交易的规律,一方面要大力发展我国的风险投资业,另一方面要增强创新型中小企业吸纳风险投资的能力。