招聘广告中的性别歧视:来自中国的证据

据最近一次人口普查,女性中“白领“工作者的比例都低于男性。但是,“白领“工作者的平均受教育年限,女性高于男性。且女性在高工资行业就业的比例都低于男性。也就是说,与男性相比,女性要得到相同工资或进入相同行业,花费的成本要比男性多,或者说,在女性花费相同成本的情况下,企业会拒绝女性或给与女性较低的工资报酬

类风湿关节炎患者康复功能锻炼的研究进展

类风湿关节炎（Rheumatoid arthritis,RA）是以侵蚀性、对称性多关节炎为主要表现的慢性、全身性自身免疫性疾病, 最终发展为关节畸形和功能丧失, 并损害心、肺、肾、神经等器官[1]。我国RA的发病率为0.32%～0.36%。该病具有病程长、复发率高、致残率高等特点,在临床上又被称为\"不死癌症\"[2],严重危害患者健康。该病治疗的目的是缓解疼痛,提高关节活动度,阻止残疾的发生。康复功能锻炼是降低国家自然科学基金资助项目(编号:71403232

GENDER DISCRIMINATION IN JOB ADS: EVIDENCE FROM CHINA

We study explicit gender discrimination in a population of ads on a Chinese Internet job board. Gender-targeted job ads are common, favor women as often as men, and are much less common in jobs requiring higher levels of skill. Employers' relative preferences for female versus male workers, on the other hand, are more strongly related to the preferred age, height, and beauty of the worker than to job skill levels. Almost two thirds of the variation in advertised gender preferences occurs within firms, and one third occurs within firm*occupation cells. Overall, these patterns are not well explained by a firm-level animus model, by a glass-ceiling model, or by models in which broad occupational categories are consistently gendered across firms. Instead, the patterns suggest a model in which firms have idiosyncratic preferences for particular job-gender matches, which are overridden in skilled positions by factors such as thinner labor markets or a greater incentive to search broadly for the most qualified candidate

Design of nanosecond pulser generator in magneto-optic switch

探讨了一种可用于磁光开关的基于雪崩晶体管的纳秒脉冲发生器,对其电路及雪崩晶体管的工作原理进行了具体分析,并对纳秒脉冲发生器电路进行计算机仿真和实验验证。测试结果表明:这种纳秒脉冲发生器能够输出上升沿2~5nS、脉宽6~20nS和上升幅度30~100V的脉冲,很适合用于全光通信网络中的磁光开关

基于生物启发材料的组装设计疏水纳米药物

纳米技术在肿瘤诊断和治疗中的应用,为延长患者的寿命和提高其生活质量带来了新的希望,成为未来医学发展最重要的指向。例如:纳米药物可提高疏水性药物的溶解度,改善药物在体内的分布,选择性地将药物送达肿瘤部位从而降低副作用。但目前开发的纳米药物仍存在装载效率较低,稳定性差等问题亟待解决。本研究中,我们

采用改进的CE/SE方法模拟方管中氢氧爆轰波的稳定传播结构

采用改进的时空守恒元/解元(CE/SE)格式和新型二步化学反应模型,对小扰动情况下方管通道中的氢氧气相爆轰传播过程进行了数值模拟,对不同截面尺寸和两种扰动模式下的爆轰波三波线结构进行了详细计算和分析。数值模拟花费了相对较少的计算代价,清晰地得到了方形截面通道中3种相对稳定的爆轰波传播结构,即直角模式、对角模式和螺旋模式。随着截面尺寸的减小,爆轰波胞格图样与波阵面结构随之产生适应性的变形,乃至出现胞格数目的减少和部分三波线的消失;最终,直角模式和对角模式都会转化为顺时针或逆时针的螺旋模式;临界尺寸下,得到了转换过程中新的过渡结构和压力脉冲振幅的变化,并以此初步讨论了直角和对角传播模式的稳定性。</p

Economic reform, education expansion, and earnings inequality for urban males in China, 1988-2009

Meng, Xin, Shen, Kailing, and Xue, Sen-Economic reform, education expansion, and earnings inequality for urban males in China, 1988-2009 In the past 20 or so years the average real earnings of Chinese urban male workers have increased by 350%. Accompanying this unprecedented growth is a considerable increase in earnings inequality. Between 1988 and 2009 the variance of log earnings increased from 0.28 to 0.54, a 94% increase. Using a unique set of repeated cross-sectional data this paper examines the causes of this increase in earnings inequality. We find that the major changes occurred in the 1990s when the labor market moved from a centrally-planned system to a market-oriented system. The decomposition exercise conducted in the paper identifies the factor that drives the significant increase in the earnings variance in the 1990s to be an increase in the within-education-experience cell residual variances. Such an increase may be explained mainly by the increase in the price of unobserved skills. When an economy shifts from an administratively determined wage system to a market-oriented one, rewards to both observed and unobserved skills increase. The turn of the century saw a slowing down of the reward to both the observed and unobserved skills, due, to some extent, to the college expansion program that occurred at the end of the 1990s. Journal of Comparative Economics 41 (1) (2013) 227-244. Research School of Economics, ANU College of Business and Economics, Australian National University, Canberra 0200, Australia; WISE, Xiamen University, Xiamen, China. (C) 2012 Association for Comparative Economic Studies Published by Elsevier Inc. All rights reserved