全文获取类型
收费全文 | 1021篇 |
免费 | 48篇 |
国内免费 | 16篇 |
专业分类
管理学 | 147篇 |
民族学 | 1篇 |
人口学 | 17篇 |
丛书文集 | 86篇 |
理论方法论 | 50篇 |
综合类 | 700篇 |
社会学 | 57篇 |
统计学 | 27篇 |
出版年
2024年 | 1篇 |
2023年 | 10篇 |
2022年 | 19篇 |
2021年 | 16篇 |
2020年 | 17篇 |
2019年 | 15篇 |
2018年 | 21篇 |
2017年 | 16篇 |
2016年 | 34篇 |
2015年 | 29篇 |
2014年 | 43篇 |
2013年 | 62篇 |
2012年 | 60篇 |
2011年 | 71篇 |
2010年 | 53篇 |
2009年 | 52篇 |
2008年 | 65篇 |
2007年 | 81篇 |
2006年 | 94篇 |
2005年 | 63篇 |
2004年 | 65篇 |
2003年 | 63篇 |
2002年 | 42篇 |
2001年 | 42篇 |
2000年 | 17篇 |
1999年 | 9篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1994年 | 5篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1987年 | 1篇 |
排序方式: 共有1085条查询结果,搜索用时 15 毫秒
1.
随着中国正式加入WTO ,推出股票指数期货已是确定的方向。目前中国建立股指期货交易制度不仅是必要的 ,也是可行的。股指期货作为一种金融创新产品 ,它的建立首先必须有统一交易场所 ,科学设计合约 ,同时也要进一步规范现货市场 ,培育交易主体 ,引入做空机制 ,规范会员结构 ,健全监管制度 相似文献
2.
Summary Based on 14 case studies of highly effective therapies and the reasons they succeeded less frequently than they could, we
propose a variety of steps to improve the health care system of the U.S.A. Whatever proposal emerges from current national
debates until innovations are shown to be safe and effective, they should not be supported; when slightly better technologies
are much more expensive than other good ones we need to consider appropriate choices carefully; simplified billing and bookkeping
would reduce our costs; when a technology is rapidly introduced cautionnary measures may be needed; tracking immunization
and repairing their omissions requires a new system; educational programs such as seen effective in hypertension should be
applied in other areas such as vaccination; in organ transplantation the nation should consider “presumed consent”; our payment
system sometimes creates perverse incentives and therefore needs review; and the preferences of the public in allocation of
health resources need to be discovered once the public is informed about the issues.
Research supported by Andrew W. Mellon Foundation. 相似文献
3.
基于Web使用挖掘的个性化服务系统 总被引:3,自引:0,他引:3
个性化服务系统是一种由多种WEB挖掘技术构成的基于用户使用的站点个性化系统。该系统使用事务聚类、使用聚类和关联规则技术等数据挖掘技术分析用户访问模式,并结合用户当前访问情况提供实时化个性服务。实验结果说明,个性化服务系统具有较好的性能。 相似文献
4.
供应链企业间的合作轨道模型 总被引:3,自引:0,他引:3
文章主要介绍了轨道模型在供应链企业合作中的应用 ,根据合作程度的不同 ,伙伴企业处于以核心企业为中心的不同轨道。文章分别从静态和动态的角度运用轨道模型分析了企业间合作关系以及这种合作关系的变化。一方面使企业间的合作问题简单化 ;另一方面 ,轨道模型便于对合作问题进行深入的定量化研究。 相似文献
5.
冯杉 《武汉理工大学学报(社会科学版)》2002,15(3):255-258
分析了我国证券市场内幕交易法律责任确认的现状以及民事责任制度缺位的原因 ,并分析了内幕交易民事责任求偿的主体资格问题以及内幕交易民事损害赔偿的归责原则和赔偿标准 ,提出了建立内幕交易民事责任制度的建议 相似文献
6.
This study examines the relationship between occupational status and fertility timing during a period of rapid development in Puerto Rico. Our fundamental hypothesis is that women with higher status occupations face greater opportunity costs than those with less valued jobs and therefore will be more likely to postpone parenthood until later ages than women without such high costs. We test this hypothesis using event history techniques with data from the 1982 Puerto Rico Fertility and Family Planning Assessment, an island-wide survey of women between the ages of 15 and 49. The analysis examines the effects of occupational status on the timing of first births, and finds strong support for the basic hypothesis, especially regarding the post-ponement of teen births. After the teen years, the effects are less pronounced. Overall, it appears that employment opportunities have played an important role in childbearing decisions in Puerto Rico.An earlier version of this paper was presented at the annual meeting of the Population Association of America, Denver, Colorado, 30 April–2 May 1992. 相似文献
7.
覃丽华 《贵州工业大学学报(社会科学版)》2006,8(6):9-11
国有企业改制的焦点集中于"两个置换"问题上,而它们之间存在着直接的依赖关系。从某种意义上来说,改制成本就是为确保新制度顺利推进而产生的社会交易费用。一方面,交易费用的存在与人力资源价值、人的本性、以及改制后企业经营管理能力有关,其支出有着重要的作用。另一方面,交易费用的存在会减少交易量,损害资产经济专门化和资源的利用,影响资源使用的边际等式和使用的密集度,且过高的交易费用会使许多潜在的交易难以转化为现实的交易,导致社会财富的净损失。因此,政府应该对其支出的流量和流向予以把握和控制,按照"支出合理,方式多样"的原则运作,推动"两种置换"的顺利完成。 相似文献
8.
David L. Weakliem 《Sociological Forum》1989,4(2):203-226
This paper tests some predictions derived from Williamson's transaction cost theory of the organization of work, which holds that the form of the employment relationship is determined largely by the idiosyncrasy of work—that is, the nature of skills and knowledge used in production. It examines the occurrence of theoretically relevant provisions in collective bargaining agreements in the United States and finds they are related to a contract-level proxy for idiosyncrasy (based on bargaining structure) as predicted by the theory. An analysis of an individual-level variable, the difficulty of finding a comparable job, provides some additional support. Finally, several alternative explanations of the results are considered, and it is argued that none are consistent with the evidence. The analysis thus finds strong, if necessarily provisional, support for the theory. 相似文献
9.
文章提出具有卖空总量限制、阈值约束和V型交易成本的多阶段均值—半绝对偏差(M-SAD)投资组合优化模型。该模型分别运用均值和半绝对偏衡量资产的收益率和风险。由于交易成本的存在,该模型不满足无后效性的动态优化问题。文章将该模型近似为一般动态规划问题,提出一种新的离散迭代方法,并证明该算法是线性收敛的。最后,文章通过实证研究比较分析卖空总量限制和风险偏好系数取不同值时对投资组合最优策略的影响,验证模型和算法的有效性。 相似文献
10.
Rubinstein (1982) considered the problem of dividing a given surplus between two players sequentially, and then proposed a model in which the two players alternately make and respond to each other's offers through time. He further characterized the perfect equilibrium outcomes, which depend on the players time preferences and order of moves. Using both equal and unequal bargaining cost conditions and an unlimited number of rounds, two experiments were designed to compare the perfect equilibrium model to alternative models based on norms of fairness. We report analyses of final agreements, first offers, and number of bargaining rounds, which provide limited support to the perfect equilibrium model, and then conclude by recommending a shift in focus from model testing to specification of the conditions favoring one model over another. 相似文献