城市饮用水源特征污染物筛查及风险评价方法

为了保护饮用水源、保障饮用安全,通过综述城市饮用水源特征污染物的筛查方法,介绍了基于环境风险框架下污染物的筛查体系(建立污染物数据库→根据评价目的确定测试终点和筛查标准→赋值计算→进行优先排序)及健康风险评价管理技术在饮用水源风险评价中的应用,以期对本地区环境决策提供有价值的科学依据。     

基于低碳设计的创新产品研发契约激励机制研究

在创新产品市场中低碳环保的产品设计受到消费者的极大关注，本文通过构建生产者和研发方之间的研发合作契约机制，激励研发方在设计中提高零部件的绿色度，从而为企业供应链获得更多的市场利润。在研发方绿色研发成本信息为公共信息和私有信息的不同情景下，生产者作为Stackelberg博弈的领导者设计了包含版权支付和版权收益分成两个契约条款的激励机制。研究比较发现，当研发方的绿色研发能力为低水平的概率超过一定比值时，采用不对称信息下的版权甄别契约组合比对称信息下的单一契约更有效，这时生产商和供应链整体能获得更多利润；反之，采用单一契约效果更好。同时，契约激励机制使低碳研发能力水平高的研发方在甄别契约中获得更多利润，而低水平研发方只获得保留利润。     

Factors Influencing the use of Preventive Medical Care in Malaysia: Evidence from National Health and Morbidity Survey Data

An increase in the prevalence of modifiable health risk factors, such as diabetes, hypertension and hypercholesterolemia, has become a serious public health issue in developed and developing countries. It is the main contributing factor to the rise in non‐communicable diseases (NCD). The use of preventive medical care remains the best method to prevent NCD. The objective of the present study is to examine the factors affecting the decisions of people to use preventive medical care (e.g. blood glucose tests, blood cholesterol tests and blood pressure test). An ordered logit model is estimated based on a nationally representative sample. The present study finds that income, age, education, ethnicity, employment status, health insurance and smoking are significantly associated with the use of preventive medical care. As a measure towards increasing the prevalence of the preventive medical care usage, the government should pay special attention to low income earners, the young and the elderly, the less‐educated, the ethnic minorities, employed individuals, individuals whose medical expenses are not paid by insurance carriers, as well as smokers.     

美国动画产业资本循环机制研究

本文通过分析美国动画产业资本循环过程中各阶段的运行机制,得出美国动画产业能够创造高额利润的主要原因是其在资本循环的各个阶段都始终贯彻"以市场需求为导向"的原则。同时,在资本循环的相应阶段结合我国动画产业的实际情况提出改进对策。     

Optimal two-object auctions with synergies

We design the revenue-maximizing auction for two objects when each buyer has bi-dimensional private information and a superadditive utility function (i.e., a synergy is generated if a buyer wins both goods). In this setting the seller is likely to allocate the objects inefficiently with respect to an environment with no synergies (see Armstrong, RES (2000)). In particular, the objects may be bundled too rarely or a buyer may win the bundle even though her valuations for the goods are weakly dominated by the values of another buyer.Received: 29 October 2001, Accepted: 29 October 2002, JEL Classification: D44, D82This paper has been written while the author was a member of the Dipartimento di Statistica e Matematica Applicata alle Scienze Umane "Diego De Castro", Universitá degli Studi di Torino, Italy. Valuable comments and suggestions were provided by Antonio Cabrales, Massimo Marinacci, three anonymous referees and, especially, by Mark Armstrong. The usual disclaimer applies.     

Weighing asset pricing factors: a least squares model averaging approach

Empirical evidence has demonstrated that certain factors in asset pricing models are more important than others for explaining specific portfolio returns. We propose a technique that evaluates the factors included in popular linear asset pricing models. Our method has the advantage of simultaneously ranking the relative importance of those pricing factors through comparing their model weights. As an empirical verification, we apply our method to portfolios formed following Fama and French [A five-factor asset pricing model. J. Financ. Econ., 2015, 116, 1–22] and demonstrate that models accommodated to our factor rankings do improve their explanatory power in both in-sample and out-of-sample analyses.     

基于销售定额的信息甄别模型和差别工资

根据不同能力类型的销售人员具有不同形状的效用曲线这一假设．建立了信息甄别模型来研究销售人员的报酬激励机制，证明了分离均衡是该模型唯一的均衡，并且优于混同均衡，得出以差别工资制取代统一工资制可以提高管理效率，减少了雇佣双方由于信息不对称带来的无谓损失，其结果具有一定的理论和实际意义。     

The role of mutual funds in the sustainable energy sector

The integration of renewable energy criteria in mutual fund investment decisions could channel private resources into the funding of environmentally related projects implemented by firms contributing to sustainable development. This paper examines the performance of European renewable energy funds that invest globally by comparing their risk‐adjusted returns with those achieved by black energy and conventional mutual funds. It uses Carhart's model on a sample of 81 renewable energy funds, 125 black energy funds, and 4,337 conventional mutual funds. The results indicate that 32.1% of renewable mutual funds—most of which adopt energy producers, renewable energy technology, and energy efficiency‐focused criteria—perform significantly better than the S&P Clean Energy market benchmark, this percentage being affected by the different states of the economy. However, none of them are able to beat the fossil fuel energy (S&P Global 1200 Energy Index) or conventional market benchmarks (S&P Global 1200 Index). Furthermore, 37.04% of renewable energy funds significantly underperform the S&P Global 1200 benchmark. Therefore, the investment in renewable energy funds has a financial cost for investors in relation to conventional fund investors.     

基于乘同余伪随机算法的调频加网效率研究

调频网点的生成体现随机性，其加网效率与多种因素相关。本文重点讨论乘同余伪随机算法生成调频网点的效率问题。首先介绍了伪随机算法用于调频加网生成网点的基本原理，在此基础上讨论了乘同余伪随机算法实现调频加网的方法机制，同时提出5种可用于调频网点生成的随机函数，并通过定量实验对5组乘同余伪随机函数生成随机数效率进行了讨论和研究。通过分析数据和曲线走势图，得出不同条件对加网效率的影响趋势，为调频加网用于印刷生产提供了理论参考。     

热断层（TTM）技术作为口岸传染病自动筛查手段的探讨

目的探讨TTM扫描成像在口岸传染病监测工作中的适用价值。方法总结口岸现行以红外测温为基础的传染病筛查模式存在的不足,深入分析TTM技术的优势,结合北京检验检疫局应用TTM技术筛查口岸常见传染病的研究成果,探讨TTM技术作为口岸一种传染病自动筛查手段的可行性。结果经对比现场红外测温筛查手段和TTM技术手段,结合北京检验检疫局的探索性研究和初步应用,TTM技术口岸常见传染病具有很高的阳性检出率并完全满足疾病筛查的要求。结论热断层技术在作为口岸传染病一种自动筛查手段具有较高的推广应用价值。