英国的“低碳转型计划”及其政策启示

作为低碳经济的先行者,近来英国正式颁布了低碳转型计划。该计划对电力部门、家庭与社区、工作场所和就业、交通系统、农业等领域的碳排放都给出了详细的应对措施,将减排目标具体量化,并在此基础上提出了明确的时间表。与此同时,计划还突出强调政府在低碳转型中的定位和作用。该计划对我国发展低碳经济具有重要启示。     

劳动力就业城市选择对城市工资溢价的影响

中国逐步从定居社会转变为流迁社会,劳动力大范围流动体现在就业城市的自主选择上,该行为对城市工资溢价产生持续影响,同时城市工资溢价又影响劳动力的就业城市选择。利用2017年中国流动人口动态监测调查数据,构建包含个体选择的处置效应模型,实证分析发现,中国存在城市工资溢价现象,劳动力的异质性特征和城市差异性特征显著影响就业城市选择行为;纠正劳动力城市选择的内生二元选择偏差后,发现中国特大城市和超大城市的工资溢价变大,而大城市的工资溢价消失,中小城市工资比大城市更有竞争力。中国城市体系中的首尾优势是劳动力理性选择就业城市的结果,这为中国实施差异化的城市发展政策来实现城市体系的整体优化和内部协调提供了新思路。     

Sharing the surplus and proportional values

Theory and Decision - We introduce a family of proportional surplus division values for TU-games. Each value first assigns to each player a compromise between her stand-alone worth and the average...     

水中Wastu技法结合颅骶疗法治疗下背痛的疗效观察

目的探索水中Wastu技法与颅骶疗法结合治疗下背痛的临床疗效和可行性。方法收集下背痛患者9例,给予水中Wastu技法与颅骶疗法,共治疗5次,治疗前、治疗后分别用视觉模拟评分(VAS)、站立多关节屈曲手指与脚尖距离变化,焦虑自评量表进行疗效评定,并进行统计学分析。结果治疗5次后,9例患者的各项评分都较治疗前有所改善,结果具有显著性相关关系。结论水中Wastu技法与颅骶疗法联合治疗下背痛安全舒适,疗效满意,患者依从性高,是可行的综合治疗方法。     

MATERIALISTIC VALUES IN HONG KONG AND GUANGZHOU: A COMPARATIVE ANALYSIS OF TWO CHINESE SOCIETIES

This article integrates two competing perspectives on value orientation. Inglehart's postmaterialism thesis stresses the permanent effects of childhood experience in which economic deprivation leads to materialism in adult life. The human development perspective, in contrast, emphasizes the evolution of a person's value system as life-cycle development unfolds new circumstances and possibilities. We adopt a developmental framework to test claims from these two perspectives. On the basis of micro-level data, we compare the materialistic values of two historically and culturally different Chinese societies, Hong Kong and Guangzhou. Findings support Inglehart's assertions that childhood experience has lasting effects and that rapid social changes create birth cohort differences in materialistic concerns. But life-cycle developments, such as education, marriage, and current social status, are equally important in influencing a person's value orientation. Both perspectives see only part of the picture, and an integrated approach is needed to better understand how people construct and maintain their value system.     

Affiliation networks with an increasing degree sequence

Affiliation network is one kind of two-mode social network with two different sets of nodes (namely, a set of actors and a set of social events) and edges representing the affiliation of the actors with the social events. Although a number of statistical models are proposed to analyze affiliation networks, the asymptotic behaviors of the estimator are still unknown or have not been properly explored. In this article, we study an affiliation model with the degree sequence as the exclusively natural sufficient statistic in the exponential family distributions. We establish the uniform consistency and asymptotic normality of the maximum likelihood estimator when the numbers of actors and events both go to infinity. Simulation studies and a real data example demonstrate our theoretical results.     

美拉德反应及其在食品工业中的应用

美拉德反应是一种常见于食品加工过程的非酶褐变反应,对食品的色泽、风味、营养、安全等方面有重要的影响。文章对美拉德反应的机理以及影响因素、当前研究热点以及在食品生产中的应用进行了综述。