全文获取类型
收费全文 | 16050篇 |
免费 | 685篇 |
国内免费 | 324篇 |
专业分类
财政金融 | 1116篇 |
工业经济 | 977篇 |
计划管理 | 4546篇 |
经济学 | 2395篇 |
综合类 | 2210篇 |
运输经济 | 239篇 |
旅游经济 | 379篇 |
贸易经济 | 2756篇 |
农业经济 | 825篇 |
经济概况 | 1616篇 |
出版年
2024年 | 62篇 |
2023年 | 232篇 |
2022年 | 306篇 |
2021年 | 410篇 |
2020年 | 566篇 |
2019年 | 391篇 |
2018年 | 373篇 |
2017年 | 417篇 |
2016年 | 447篇 |
2015年 | 541篇 |
2014年 | 1134篇 |
2013年 | 1301篇 |
2012年 | 1390篇 |
2011年 | 1585篇 |
2010年 | 1187篇 |
2009年 | 958篇 |
2008年 | 1199篇 |
2007年 | 1062篇 |
2006年 | 953篇 |
2005年 | 777篇 |
2004年 | 554篇 |
2003年 | 420篇 |
2002年 | 259篇 |
2001年 | 202篇 |
2000年 | 118篇 |
1999年 | 59篇 |
1998年 | 41篇 |
1997年 | 33篇 |
1996年 | 26篇 |
1995年 | 9篇 |
1994年 | 5篇 |
1993年 | 9篇 |
1992年 | 11篇 |
1991年 | 6篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1983年 | 2篇 |
1982年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
151.
当今社会,随着科学技术的迅猛发展,信息技术实现了持续快速发展。在大环境的影响下,云计算与网络虚拟化技术应运而生。该技术的产生和发展促使云数据中心网络的变革与发展成为新一轮技术革命的核心内容之一。当前,IT行业对数据中心网络的需求越来越大。基于此,论文论述了云数据中心网络虚拟化技术的实现路径。 相似文献
152.
尹海军 《中小企业管理与科技》2021,(9)
随着当前社会与经济的发展,对于石油等能源物质的需求量不断增加,石油在物流运输过程中所产生的成本也在不断提升。为降低我国石油物流运输工作过程中的成本,需要对当前石油物流的整体发展进行研究,并且基于此构建中国石油物流网络系统,从而使石油物流网络的整体运转效率得到提升并且降低成本。 相似文献
153.
This study investigates whether gold, USD, and Bitcoin are hedge and safe haven assets against stock and if they are useful in diversifying downside risk for international stock markets. We propose a combined GO-GARCH-EVT-copula approach to examine the hedge and safe haven properties of gold, USD, and Bitcoin. We then examine the attractiveness of these assets in reducing stock portfolio risk by using downside risk measures estimated by the proposed approach and other competing models. We also evaluate the relative performance of the proposed model in reducing downside risk with the competing models. The findings of the study indicate that the USD is the most valuable hedge and safe haven asset closely followed by gold, while Bitcoin is the least valuable. It is also observed that the proposed combined approach performs best in reducing the portfolio downside risk. The findings of this study are of significance for portfolio managers and individual investors who wish to protect the portfolio value during market turmoil. 相似文献
154.
Socioeconomic predictors of forest use values in the Peruvian Amazon: A potential tool for biodiversity conservation 总被引:1,自引:0,他引:1
Conservation is a crisis discipline requiring rapid action with limited funds. This study examines the potential of socioeconomic variables to predict forest use values. If natural resource use can be predicted from socioeconomic data, conservation planners could rapidly identify and focus conservation programs on the sectors of local populations that most intensively utilize local flora and fauna. Families in three communities in the northern Peruvian Amazon were surveyed over a 6-month period. Data were collected on use of flora and fauna from six locally determined use categories (food, medicine and poisons, wood, weavings, adornments, and “other”) in forest types of three age classes (fallow fields—very young forests, young secondary forests, and old secondary forests). Forest use values were the dependant variables calculated in $/ha/year. Socioeconomic variables included: age, education, family size, residence time, land worked, land owned, number of fishing nets, chickens, pigs, cows, and/or mules owned (all proxies for productive assets), and level of ecological knowledge (ability of informants to correctly identify forest species and answer basic questions about their biology). Ordinary least square multiple regressions were run independently for each forest type. Regressions were also run separately for the two most valuable use categories, food and wood. Low R2 adjusted values (all < 0.3) reflect the difficulty in predicting human behavior due to confounding variables and complex interactions. Residence time and a household's community of residence were the most significant predictors of forest use values. Households in Vista Alegre, the community with the highest density of people and smallest landholdings per household, extracted the highest value of forest products per hectare. The longer a family stayed in any community the higher the value of forest goods they extracted. If families that lived in an area longest are the most intensive extractors of forest products, they should be a major focus for conservation programming. In addition, the higher value of products extracted from forests by some families may make them more open to strategies seeking to protect long-term viability of the resources they utilize. The importance of residence time also indicates that planners need to account for changes in the resource use patterns of stakeholders over time. 相似文献
155.
客户知识的关键维度及其管理过程 总被引:2,自引:1,他引:2
客户知识成为企业维持持续竞争优势的关键资源。理解客户知识的内涵和关键维度是企业进行客户知识管理的前提和基础,论文结合不同行业企业的实践经验,提出客户知识应包括四个关键维度:用于客户的知识、来自客户的知识、关于客户的知识和共同创造的知识,并针对每个雏度分析了企业当前运用的管理方法,基于此.界定了客户知识管理的概念,构建了客户知识管理的过程模型,为企业有效进行客户知识管理提供参考。 相似文献
156.
Kyu Sang Lee 《Experimental Economics》2005,8(2):171
This dissertation aims at elucidating the history of Vernon Smith’s experimental economics by focusing its attention upon the three themes of rationality, minds and machines that assumed significance at different (albeit overlapping) stages of the development of Smith’s experimental economics with the help of his published and unpublished papers.Chapter 1 is devoted to the scrutiny of the form of rationality incorporated into the portions of Smith’s laboratory experiments whose results have usually been taken as corroborations of his “Hayek Hypothesis.” By bringing into the foreground Smith’s definite position on demand theory and its concrete instantiations on many different occasions, we make the case that Smith has consistently imposed by means of the induced value theory certain narrowly defined preference structures that have definite implications for the form of rationality instantiated in the laboratory.The main narrative in Chapter 2 concerns Smith’s intellectual interchanges with behavioral scientists in the early 1960s, more specifically, his reactions to behavioral scientists’ attempts at cognitive modeling. We present several reasons for interpreting Smith’s initiation of the attempt at the maximization-based induced value theory as an endeavor to discipline subjects’ minds. We also provide in Chapter 2 a portrayal of Smith’s missed opportunities to get involved in the large-scale laboratory experimentation projects pursued in the 1950s in close connection with several branches of psychology.Chapter 3 consists of two parts. In Part 1, we describe the origin of mechanism design economics, and offer a detailed explanation of the analytical kinship between Smith’s “microeconomic system theory” and the standard conceptual framework utilized in mechanism design economics. Part 2 is devoted to describing the roles played by the computer in both Smith’s empirical research agenda and the theoretical, mechanism design research pursued by Stanley Reiter (one of Smith’s intellectual companions since the 1950s). Our historical narrative in Chapter 3 is intended to clarify that computer experience and computational theory drove the development of Reiter’ version of mechanism design economics, and that they also (partially) shaped some crucial events in the history of Smith’s version of experimental economics.JEL Classification: B21, B31, C90, C92, D02Prof. Philip E. Mirowski: Advisor 相似文献
157.
Summary. We examine how irreversible capital reduces the possibility of a duopoly to sustain implicit collusion by grim strategies,
when the product is homogenous and firms compete in quantities. Compared with the case of reversible capital, there are two
countervailing effects: Deviation from an existing collusion is less attractive, because capital once installed causes costs
forever. But the punishment will also be less severe due to the high capacity the deviating firm can build before punishment
starts. The last effect dominates, meaning that the commitment value of capital is negative for all firms. If capital is irreversible,
collusion breaks down for realistic magnitudes of interest rates.
Received: April 30, 1999; revised version: November 30, 2001 相似文献
158.
广西在大西南出海通道的建设中占有极其重要的地位,本文采用网络模型,按现状与规划路网两种情况,综合考虑陆上距离和去不同方向市场的海上距离,分析了北海(代表广西港口群)、湛江、广州等三条出海通道的三个港。各自的吸引范围。并由此得出了一些有益的结论。 相似文献
159.
J.K. Horowitz 《Environmental and Resource Economics》2002,21(3):241-258
Environmental economics has been much occupied with the discount rate, which is the value of future costs and benefits relative to present costsor benefits. But at least as important is the question of whatshould be discounted, that is, what the value of those future environmentalbenefits is to future generations. This paper analyzes the role for futurepreferences and discusses the state of knowledge. I argue that theappropriate discount rate is the market one, and that the real problemis determining future willingness-to-pay. This approach makes clearerthe connection between discounting and the valuation debate.This paper focuses on two features that have been prominent in that debate:existence value and reference dependence. I argue that thereis a vital connection between the two constructs and that this link yieldsimportant implications for future willingness-to-pay. 相似文献
160.
This paper focuses on problems associated with nonresponse in Contingent Valuation surveys. The results from a telephone follow-up survey show that value inference can be considerably improved by information on nonrespondents' attitudes. 相似文献