Living Standards in China during the 20th Century:Secular Change in the Age at Menarche

来源 :河南大学 | 被引量 : 0次 | 上传用户:chenchenyaya
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  This paper uses the mean age at menarche as an indicator of long term changes in the standard of living in China.It discusses the difficulties of doing this in terms of the quality of the available data,the processing the basic data,and the interpretation of the results.The paper finds that the mean age at menarche stagnated at 16 to 17 years for women born during the 1880s-1930s,although it also finds evidence of decreases in some urban areas,such as Beijing and Shanghai.The mean age at menarche increased for birth cohorts in the 1940s,in part due the negative effects of the China-Japan war and the civil war until 1949,but particularly the famine of 1959-1962 that affected these cohorts during puberty.The age at menarche decreased in a sustained way for women born during the 1950s to early 2000s to a level of 12.1 in 2000-03.This decrease preceded the acceleration of economic growth in the 1980s.Analysis finds that improvements in education since the 1940s explains much of the decrease in menarche,ahead of improvements in nutrition,hygiene and healthcare.
其他文献
本文讲述了高层悬挑结构的方案设计和施工方法,结合施工的实际情况与同类工程的共同点和特殊性,从设计选型、计算、施工、安全、进度及经济型因素综合考虑,选用双层悬挑工字钢方法进行施工.该方法施工可以有效的使荷载合理的在两层工字钢间分配,使结构受力体系更为可靠完善,悬挑工字钢悬挑端使用圆钢拉索卸荷,不参与受力计算,作为安全储备,配合悬挑工字钢端部斜撑钢管设置,类似桁架组合,使结构具有桁架的特性,又能够很好
当前阶段铝模板技术的应用是模板技术发展主要方向,就目前铝模板行业发展来看,研究和开发出一套符合建筑施工使用的专业铝模板设计软件,变得尤为必要和紧迫.本项目的目的在于开发基于BIM的铝模板设计软件,将建筑信息模型技术应用到铝模板设计软件中,结合建筑工程相关专业设计标准,实现设计过程协同工作,数据共享,提高铝模板自动化程度和设计效率;提供本专业设计分析工具,提高设计方案的合理性、准确性、经济性.
The pre-Qin period,particularly the Spring and Autumn period(770BC-481BC)and the Warring States period(480BC-221BC)witnessed the great transformation of the Chinese society from a classical feudal sys
会议
This paper focuses on the correlation between local socioeconomic development and state-making process across regions.Regardless of development gap between regions,local socioeconomic progress do have
会议
This paper examines how fiscal decentralization affected the transformation of state capacity and bureaucratic power-sharing in China during the late Qing period,utilizing a unique data set covering t
Political stability is associated with economic growth.This paper provides within coun-try evidence on this issue.Specifically,I examine how political stability promoted industrial investments in Chin
会议
This paper studies the long-run development of Chinese locations that were taxed by Western institutions.In 1902,Western-controlled customs in China began to regulate and tax Chinas inland trade withi
We paint a detailed picture of how the social environment of the Qing with its household di-vision system in the absence of public education shaped the tradeoff between human capital and fertility dec
会议