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.     

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。     

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.     

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。     

儿童攻击行为的性别差异

文章论述了攻击行为发展的性别差异特点,生物因素和环境因素对儿童攻击行为性别差异的影响,以及儿童攻击行为的矫正方法。     

A subjectivist approach to consecutive conflict

An easily applied approach is developed to provide one participant in a sequence of conflicts with an optimal strategy. A goal of this article is to demonstrate that it is mathematically feasible to incorporate a decision maker's subjective distributions over the effects his actions will have on the outcomes of future conflicts. Unlike many other approaches, the model of this article does not restrict the beliefs that the participant is allowed to express. The participant, not the decision theorist, decides on what is relevent. Model assumptions required for updating rules, such as Bayesian updating, are not required unless they really are appropriate for the situation.Thanks are due to J. B. Kadane for suggesting the problem and for many helpful discussions.     

法律保护公民性权利的应然分析

在人类社会进入到以张扬个人权利为核心的现代社会,性权利沦为性秩序的牺牲品的年代应渐成历史;揭开婚姻囚禁性权利的面纱也并非难事。从性秩序走向性权利的过程对法律的诉求自然会越来越高。揭开公民性权利长期以来被遮蔽的面纱,尊重并切实保护公民的性权利,使其从应然走向实然,从伦理走向法律,在法律的自由空间最大限度地实现自身的彻底解放应是法律不得不挑起的重担。     

交易延迟与机构投资者交易策略研究

对于机构投资者而言,出清具有一定规模的证券时,其提交指令的行为将对证券价格造成冲击形成交易成本,之后指令执行延迟也造成交易成本。文章以既定风险厌恶的机构投资者为研究对象,探讨其在交易延迟下的最优指令提交策略。经研究表明:交易延迟下最优指令提交策略受风险态度、证券收益、证券价格的波动性、市场的流动性与深度以及瞬时冲击程度等参数影响,不同市场的情况要求机构投资者调整策略,改变指令提交过程。     

从和谐管理理论到和谐社会的机制分析

面对多元化的社会冲突与构建和谐社会的大背景,在回顾和谐管理理论的基础上,构造了一个在复杂多变环境下基于智能体的心理偏好和行为模式的和谐机制,指出智能体心理偏好和行为模式变化有一定的滞后性,和谐管理就是要改造和实现一定的心理偏好和行为模式;构建社会主义和谐社会,应该实现社会智能体“以人为本”心理偏好和行为模式。     

试析利他行为的不同类型及其原因

利他行为可区分为软利他行为和硬利他行为.软利他行为可以用人的利己心解释,而硬利他行为则否.硬利他行为又可以分为有限硬利他行为和无限硬利他行为,有限硬利他行为服从边际效用递减率,而无限硬利他行为则否.无限硬利他行为的形成与进化无法单纯用个体之间的竞争来解释,它是人类在个体之间和群体之间多个层次的竞争当中的适应性行为,是在多层竞争中形成与进化的,是多层竞争选择的结果.