首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   22257篇
  免费   1970篇
  国内免费   64篇
财政金融   1502篇
工业经济   1268篇
计划管理   5872篇
经济学   4072篇
综合类   2556篇
运输经济   326篇
旅游经济   771篇
贸易经济   3017篇
农业经济   2199篇
经济概况   2708篇
  2024年   10篇
  2023年   417篇
  2022年   444篇
  2021年   640篇
  2020年   821篇
  2019年   577篇
  2018年   560篇
  2017年   761篇
  2016年   683篇
  2015年   743篇
  2014年   1752篇
  2013年   2179篇
  2012年   1946篇
  2011年   2374篇
  2010年   1738篇
  2009年   1464篇
  2008年   1570篇
  2007年   1409篇
  2006年   1144篇
  2005年   885篇
  2004年   623篇
  2003年   376篇
  2002年   248篇
  2001年   221篇
  2000年   160篇
  1999年   91篇
  1998年   96篇
  1997年   66篇
  1996年   56篇
  1995年   51篇
  1994年   42篇
  1993年   23篇
  1992年   20篇
  1991年   18篇
  1990年   10篇
  1989年   9篇
  1988年   5篇
  1987年   4篇
  1986年   9篇
  1985年   11篇
  1984年   12篇
  1983年   10篇
  1982年   7篇
  1981年   2篇
  1980年   2篇
  1979年   2篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
The purpose of this article is to identify key characteristics of the community of leisure scholars in North America and to use patterns derived from data about publication activity as a platform for discussing the nature and implications of concentration in leisure research at the individual and institutional levels. The study uses cluster analysis to detect patterns of research and publication activity among 1785 people who were associated with leisure research in North America in the 1990s, concentrating on the slightly smaller number of people (1631) whose names were listed as authors on at least one publication in all editions of 6 research journals and 14 conference proceedings from 1990 to 1999 inclusive. The results demonstrate that leisure research in North America is concentrated at both the individual scholar and institutional levels. For example, at the individual level, less than one-fifth of authors accounted for more than two-thirds of journal articles and conference papers. The implications of these findings are discussed with reference to issues such as the critical mass of scholars and problems of disciplinary isolation detected by previous researchers.  相似文献   
2.
Abstract

Hunter retrieval of wounded deer was used as a case study to examine applications and limitations of leisure research for the management of recreational behavior. All hunters receiving permits to hunt in the Shiawassee National Wildlife Refuge during November 1–20, 1983, were sent mail questionnaires. A total of 457 (93 percent) of the archery and 143 (95 percent) of the firearm permittees responded after 3 mailings. Archery deer hunters were estimated to have retrieved 29 (43 percent) of the 68 different deer hit by arrows. Shotgun hunters were estimated to have retrieved 42 (81 percent) of 52 different deer hit. Discriminant analysis showed that the retrieval of deer hit with arrows was most likely when the shooter had tagged a large number of deer during former archery hunts, when the deer was hit in a position other than broadside, and when the range of the shot was short. Deer hit with slugs were more likely to be retrieved when hit by hunters with little experience in tagging deer during former firearm hunts, when the shooter also hunted deer with a bow and arrow, and when the shot was taken at deer that were not running. These data were interpreted to suggest how retrieval rates might be increased through regulation, education, and management of the recreational environment. The role of leisure research and theory in providing techniques and a rationale for modifying the behavior of recreationists is discussed.  相似文献   
3.
This paper positions mixed methods as a complement to traditional qualitative and quantitative research. It provides an example of conducting mixed methods research by analysing the sociocultural sustainability of tourism as perceived by local stakeholders nearby Oulanka National Park in north-eastern Finland. Semi-structured interviews were linked concurrently to survey data from the same respondents. First, four discourses were identified based on 40 interviews with respondents about tourism development pertinent to the Protected Area Network (PAN) Parks international certification. Second, the differences between the representatives of the discourses were examined using non-parametric statistics. Results of the qualitative and quantitative analysis supplemented each other. The survey results supported the identification of four discourses and provided information about the representatives using the discourses. The discourse groups differed according to length of residence in the area, distance from the park, gender, employment in tourism, familiarity with PAN Parks, benefit from PAN Parks status, belief in the benefits of PAN Parks, satisfaction with tourism and park development, importance of the environmental dimension and satisfaction with various dimensions of sustainability. The study demonstrates that a better understanding of a problem may be acquired by using a mix of survey methods and interviews.  相似文献   
4.
Recent history has seen an increase in the utilization of partial equilibrium based forest sector models to identify potential impacts of various policies or timber market shocks. These models are particularly useful in that they employ economic theory to capture the interaction of supply and demand in a framework where commodity prices are endogenous to the policy or shock simulated. We present recent developments and linkages between models and review applications of these models to forest policy questions over the previous decade. We conclude with a discussion of potential future directions for such research.  相似文献   
5.
This article presents the outcomes of an evaluation of the impact of the series of mergers of the local exchange companies that have taken place between 1988 and 2001 on an important measure of performance of the firms undergoing the mergers. The analysis reveals that after firms have undertaken one merger they experience little or no growth after such mergers, but the impact of second mergers on firm growth have been negative. If an important motive in undertaking mergers has been to enhance firm growth, then the merger waves that have been approved and consummated have led to performance declines. The impacts of the merger wave on the growth of the telecommunications sector firms have been negative.  相似文献   
6.
中国区域经济差异与极化的时空分析   总被引:3,自引:0,他引:3  
借鉴国外相关差异系数和极化指数等系列数理公式,以地级行政区为基本单元,2000-2010年连续11年为研究时段,定量分析了中国区域经济差异与极化的演变过程和格局.结果表明:近10年的中国区域经济差异和极化演变趋势基本一致,总体呈现波动上升态势;从演变格局来看,东部地区的经济差异和极化较为显著,西部地区经济差异与极化扩大增强较快,东北地区的经济差异和极化呈现不断下降趋势,而中部地区经济差异和极化较小,却呈现逐步扩大趋势;就省域而言,大部分省域内部差异和极化的变化正向关联.  相似文献   
7.
专业村类型形成及影响因素研究   总被引:8,自引:0,他引:8  
中国的专业村发展在国际上具有一定的独特性.文章以相关理论为基础,构建了专业村类型形成机理和主导因素分析框架,提出企业家精神是专业村形成的主导因素,分工与专业化、邻里效应与距离衰减理论是专业村形成机理的重要组成部分,而地理区位、资源禀赋、传统文化与习俗以及经济基础决定着专业村类型.在此基础上,以河南省四个典型专业村为案例对其进行实证研究.研究表明,能人决定一个村庄能否成为专业村,而不同地理因素对专业村类型的作用大小和作用方式存在显著差异,基本支持所提出的理论框架,进而提出各地应充分发挥村内外能人的作用,根据其区域优势发展特色专业村.  相似文献   
8.
This paper constructs a number of possible core measures of inflation using singular spectrum analysis (SSA). Annual changes in monthly inflation are decomposed into its trend, oscillatory and noise components in order to develop an understanding of the trend and cyclicality in South African headline inflation. Three cyclical components with differing amplitude and frequency are identified. The trend and cyclical components of inflation are found to be a good approximation of core inflation, the inertial part of inflation. These core measures are compared with other candidate core measures based on the properties of a good core inflation measure. Generally, the SSA measures outperform commonly used measures of core inflation based on both in‐ and out‐of‐sample performance.  相似文献   
9.
根据广西统计年鉴2010数据,选取广西各地市的10个主要经济指标,通过因子分析和聚类分析方法对广西区域经济的发展状况进行了分析。研究结果显示广西14个地市划分为4类区域经济,结果与广西经济发展实际一致。  相似文献   
10.
城市可持续发展能力直接影响着城市的发展潜力和发展后劲。本文在借鉴国内外可持续发展指标体系研究成果的基础上,结合宁夏沿黄城市带实际,构建了包括经济、社会、资源与环境三大子系统的20个具体指标,建立了宁夏沿黄城市带可持续发展评价指标体系。通过采用主成分分析法系统分析了2007-2011年宁夏沿黄城市带可持续发展能力,并从优化空间布局、加强环境保护、培育特色集群等方面提出了提升宁夏沿黄城市带可持续发展能力的相关对策建议。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号