中国股票市场价格波动特征分析

在股票市场中最令人捉摸不定,也最具有吸引力的是波动不已的股票价格。文章对中国股票市场价格波动的分析是从1997年9月展开至2002年10月,其间恰逢中国股市经历了一段从牛市的繁荣到熊市的萧条的过程,两种泾渭分明的市场氛围恰好提供了一个深入研究股票市场价格波动特征的有利契机。遵循经济控制论研究的思路,文章采用了理论分析、市场交易数据的实证研究等技术手段对中国股票市场价格波动进行了研究,通过运用经济控制论的方法建立理论模型,以上海股市和深圳股市的综合指数为样本,对中国股票市场系统本身的波动特征和稳定性进行了量化分析。     

企业资本结构与产品市场战略

直到20世纪80年代,企业资本结构对产品市场竞争的影响才引起经济学家的广泛关注.对于这一问题的研究,存在着两种截然不同的理论结论:一种观点认为企业债务水平的提高会使其在产品市场竞争中更为强硬,增强其竞争力;另一种观点则恰好相反.事实上,企业的融资决策具有两种不同的间接效应:代理效应和策略效应.企业的融资决策在其代理效应和策略效应的平衡点达到最优.企业的融资决策与其产品市场策略之间的关系依赖于代理问题的性质、不确定性的来源及产品市场的特征等因素,企业的最优资本结构应该随这些因素的变化而变化.     

Neighborhood Structure,Social Organization,and Number of Short‐Term Sexual Partnerships

We examine the relationship between neighborhood structural characteristics, social organization, and the sexual partnering practices of adults. Analyses of 1990 census and 1995–1997 survey‐based data on Chicago neighborhoods and adult sexual activity reveal for men a number of neighborhood influences on sexual partnering practices. First, residential stability is negatively associated with having a short‐term sexual partner in the last year. Second, neighborhood social ties are positively associated with short‐term sexual partnering in neighborhoods with low levels of collective efficacy—the combination of cohesion and shared expectations for beneficial action among neighbors—but this effect is substantially reduced as collective efficacy increases. Moreover, neighborhood collective efficacy and social ties mediate the effect of residential stability on sexual partnering practices. Neighborhood characteristics were not associated with short‐term sexual partnering for women.     

证券市场的开放与规则的发展--以B股规则为中心的检讨

人民币特种股(B股)市场作为我国证券市场开放的窗口和试验田,至今已存在10余年,相比它短暂的辉煌,如今的B股市场已经日益“边缘化”,除了进行投机,B股还能为中国证券市场开放做些什么?结合我国证券市场的特点,深入分析B股市场的发展及其规则变迁,认真总结其经验和教训,对我国在证券市场开放过程中建立健全相关法律制度很有借鉴意义。     

论中国证券市场监管低效的制度性因素

分析了作为政府强制性的制度安排,中国证券市场在发展过程中产生的市场不规范问题,认为证券市场监管制度的低效运行是问题产生的主要原因。而监管困境的背后则是制度的缺陷,主要表现为两个方面:一是监管当局政策目标与监管目标的冲突;二是以个人和企业信用为核心的信用管理体系的缺失。     

基于旅西日本游客旅游选择行为的西安旅游市场分析

根据在全国六大旅游热点城市所做的旅游市场调查的数据结果，对旅西日本游客的旅游选择行为进行了研究，同时进一步有针对性地对西安日本客源市场进行了SWOT分析，在此基础上，对西安旅游业的发展提出了相关对策建议。     

Forced to work and liberated from work

The work-welfare nexus is essential in all social policy regimes. The question is in what situations individuals should be entitled to social welfare benefits and in which situations they should be obliged to work. Social welfare law and administrative practices define mechanisms that separate the deserving poor from people able to work. This article analyses the functions and character of these "separation mechanisms" in Sweden during three periods in history: a) in rural society in the late 19th century; b) in industrial society during the successful years of the Swedish model from World War II until the late 1970s; and c) the present, including the period of welfare retrenchment and reconsideration since the early 1980s. The conclusion is that Swedish social policy has always been strongly work-oriented, but the specific form and content of the work ethic has varied under the influence of different ideologies and handled in different social policy institutions. Under specific conditions the work line has been either generous or restrictive and it has been based on structural attempts to improve the opportunities to work as well as on attempts to strongly pressure the individual to work. The work line of today is seen as an interesting attempt to combine an effort to create good work through improved work conditions and an effort to reinforce elements of work enforcement in the social insurance system.     

幼儿父母的教养行为与对子女控制感的关系

研究表明:幼儿家长在教养活动中同时运用支持、惩戒和溺爱三种教养行为,但三种行为在其全部教养行为中所占比例不同,支持行为最多,惩戒和溺爱行为较少;家长的支持教养行为与其对子女的控制感呈正相关,而惩戒和溺爱行为则与控制感呈负相关.     

浅谈实行建设工程无标底招标利弊及建议

本文分析了无标底招标的特点和利弊,在肯定无标底招标的同时,建议不可盲目实行,提出加强法律、法规建设,规范建筑市场和参与各方的行为是解决问题的关键。     

一类Kermack—Mckandrick方程组初值问题

本文研究描述传染病现象的一类Kermack—Mekandrick方程组初值问题光滑解整体存在唯一性及渐近性质。