全文获取类型
收费全文 | 16864篇 |
免费 | 701篇 |
国内免费 | 323篇 |
专业分类
财政金融 | 1223篇 |
工业经济 | 800篇 |
计划管理 | 3803篇 |
经济学 | 2997篇 |
综合类 | 3210篇 |
运输经济 | 265篇 |
旅游经济 | 234篇 |
贸易经济 | 2160篇 |
农业经济 | 1178篇 |
经济概况 | 1999篇 |
信息产业经济 | 3篇 |
邮电经济 | 16篇 |
出版年
2024年 | 7篇 |
2023年 | 79篇 |
2022年 | 285篇 |
2021年 | 613篇 |
2020年 | 357篇 |
2019年 | 169篇 |
2018年 | 172篇 |
2017年 | 295篇 |
2016年 | 244篇 |
2015年 | 638篇 |
2014年 | 926篇 |
2013年 | 1046篇 |
2012年 | 1474篇 |
2011年 | 1625篇 |
2010年 | 1568篇 |
2009年 | 1442篇 |
2008年 | 1460篇 |
2007年 | 1466篇 |
2006年 | 1331篇 |
2005年 | 1098篇 |
2004年 | 495篇 |
2003年 | 330篇 |
2002年 | 262篇 |
2001年 | 271篇 |
2000年 | 145篇 |
1999年 | 33篇 |
1998年 | 11篇 |
1997年 | 7篇 |
1996年 | 5篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 5篇 |
1992年 | 8篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1988年 | 3篇 |
1986年 | 1篇 |
1984年 | 4篇 |
1981年 | 3篇 |
1966年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 250 毫秒
1.
快递自提点作为解决物流"最后一公里"服务瓶颈问题的关键,逐渐成为地理学研究新的关注点.本文基于2020年3月哈尔滨市菜鸟驿站和邮政站点的POI数据,综合运用文本分析、数理统计等方法,分析哈尔滨市快递自提点的空间布局特征和影响因素,研究发现:哈尔滨市快递自提点存在布局不平衡现象已初步显现,市辖区快递自提点布局存在冗余和空间浪费现象,而远郊县快递自提点存在建设较薄弱等问题,并有针对性地提出了哈尔滨市快递网点布局服务体系的优化对策. 相似文献
2.
3.
4.
提出了一种由单形规范线性分段(SCPWL)函数与记忆多项式级联的数字预失真器,并给出了复数域两步最小二乘参数辨识算法。不同于以往一种预失真器适用一种功放模型的情况,所提的预失真算法利用SCPWL函数的分段特性以及记忆多项式的非线性记忆特性,在完成参数辨识的同时自动地调整结构,可适用于传统以及强非线性新型功放模型的线性化补偿。将所提预失真器分别应用于传统记忆多项式、两箱模型以及新型包络跟踪功放。经过计算机仿真,功放输出的幅频特性和频谱曲线表明所提预失真器能够有效地补偿多种功放的非线性特性。算法仿真比较结果也表明,针对包络跟踪功放,所提复数两步最小二乘算法的邻道泄漏比(ACLR)可改善约35 dB,性能优于最小均方(LMS)类算法约30 dB。 相似文献
5.
Kamalesh Kumar Giacomo Boesso Rishtee Batra Jun Yao 《Business Strategy and the Environment》2021,30(5):2354-2366
Drawing upon the research in institutional theory and comparative capitalism, the present study investigates how cross-national differences in the political, business, and economic institutional contexts of the United States, Italy, and Japan are associated with the ways in which companies in each of these countries prioritize and engage in their stakeholder engagement activities (SEAs). Using Porter and Kramer's framework, which classifies corporate social responsibility (CSR) activities as falling into four categories (good citizenship, mitigating harm from value chain, transforming value chain activities, and strategic philanthropy), we investigate how companies in the United States, Japan, and Italy prioritize and engage in these four SEAs. An analysis of data collected from 340 companies across these countries reveals that while companies in each of these three countries undertake the four types of SEAs, the prioritization and prevalence of the four types of SEAs vary from one country to the other, in ways that align with the prevailing institutional contexts of each country. The results contribute to a more nuanced understanding of why and how companies' approaches to CSR differ across countries. From a practitioner's perspective, the findings highlight the cultural specificity of CSR, implying that despite the global nature of CSR, the implementation of CSR needs to be tailored to a country's context. 相似文献
6.
户籍制度是我国劳动力流动的主要障碍.那么,当前我国的户籍扭曲程度几何?户籍制度放松对经济又会有怎样的影响?对这些问题的回答将有助于政府评估户籍制度改革的空间和经济效益.文章在Hansen和Prescott(2002)的两部门劳动力流动模型基础上,将工人分为农业和非农户口,引入户籍扭曲因子,构建两部门两类工人的户籍扭曲模型;然后,使用1984?2013年宏观经济数据度量户籍扭曲程度,并对2013年我国户籍制度逐渐放松过程中经济变量的变化进行模拟;最后,文章建立了包含"农业与非农"和"本地与外地"户籍差异的省份异质性户籍扭曲模型.研究表明:(1)经济和户籍制度改革的不同步导致了1984?2013年我国户籍扭曲程度呈现倒"U"形变化,且相较于韩国尚有较大的改善空间;(2)以韩国为参照,若2013年我国户籍制度完全放开,经济达到均衡时,农业部门和非农部门的就业人数将分别下降58.83%和上升26.92%,工资率将分别上升19.44%和下降6.77%,社会增加值将增长15.33%,这说明社会经济效率将得到提升,贫富差距将缩小.文章丰富和完善了户籍扭曲的理论模型,从减少劳动力流动摩擦的视角为政府制定相关政策提供了参考. 相似文献
7.
Resource Dependence and Network Relations: A Test of Venture Capital Investment Termination in China 下载免费PDF全文
This study examines how venture capital (VC) firms terminate investments in an emerging economy context. We contend that due to the weak institutional environment, it is appropriate to draw on insights from power and social relation perspectives for a better understanding of the phenomenon. Specifically, we argue that a termination decision hinges on not only the dependence relationship between a VC firm and its portfolio companies, but also the social relationships among VC firms. Event history analyses of approximately 12,000 VC deals made in China between 2001 and 2012 reveal that when a VC firm has a greater number of investments in an industry, it is more likely to terminate investments on a portfolio company in that industry. Moreover, such effect on termination is moderated by the focal VC's embeddedness with its syndicate partners and collaboration opportunities with other VC firms outside the immediate access of the syndicate partners. Our study sheds light on research on VC decision making in emerging markets by integrating insights from resource dependence relationships and interorganizational network characteristics. 相似文献
8.
Jun Sung Kim Sophie Deborah Mitchell Liang Choon Wang 《The Australian journal of agricultural and resource economics》2019,63(3):439-471
Using data from one of Australia's largest thoroughbred auction houses, we investigate the price determinants of thoroughbred yearlings sold at auction. We include novel key variables to construct hedonic pricing models and examine the relative role of stud fees compared to the wide range of attributes in the pricing of yearlings. We find that the price effect of stud fees is influenced by the value buyers place on both the characteristics of sires and the characteristics of sire side siblings. The findings imply that the quality of dams a sire has been matched within the breeding market has consequential effects on yearling prices through the sire's stud fee and progeny. 相似文献
9.
吴业国 《广东农工商职业技术学院学报》2015,(1):67-71
南宋时期的城市,迫于军事对峙形势,在强化其经济功能之外,防御性能也日渐加强,表现为军事性城寨普遍存在。南宋凭借强大的人力和财力支持,在南渡之初练兵与筑城之争后,形成了筑城防御之风。在城郭的结构和防御设计上,呈现出对唐城的因袭和创新,采取城砖包砌法,并设有专门的筑城队伍和人员。在中国古代城市发展史上,具有重要的意义。 相似文献
10.
Jun Hu Huiying Wu Sammy Xiaoyan Ying Wenbin Long 《Journal of Contemporary Accounting and Economics》2021,17(1):100237
Unlike most of the literature that examines the relationship between corporate philanthropy and financial performance, this study investigates the mechanisms through which corporate socially responsible behaviors produce financial outcomes. We propose that corporate philanthropy improves corporate competitiveness by eliciting positive responses from stakeholders, who assess a firm’s philanthropic contribution in relation to its rivals to determine what level of support they wish to provide to the firm. We predict that a firm’s philanthropy relative to its rivals has a positive effect on its product market competitiveness, and that this positive effect is moderated by three conditions that influence stakeholder response: stakeholder attention to philanthropy, its perceived legitimacy, and expectations of corporate giving. Our predictions are generally supported by our analyses. Overall, this paper shows that strategic philanthropy has a quantitative dimension, and firms obtain the market competitiveness associated with corporate philanthropy by integrating their rivals’ positions into their decision making. 相似文献