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   9953篇
  免费   297篇
财政金融   1890篇
工业经济   827篇
计划管理   1791篇
经济学   2207篇
综合类   131篇
运输经济   73篇
旅游经济   174篇
贸易经济   1577篇
农业经济   489篇
经济概况   1069篇
信息产业经济   1篇
邮电经济   21篇
  2023年   71篇
  2021年   78篇
  2020年   132篇
  2019年   205篇
  2018年   222篇
  2017年   256篇
  2016年   260篇
  2015年   153篇
  2014年   229篇
  2013年   1020篇
  2012年   316篇
  2011年   353篇
  2010年   295篇
  2009年   344篇
  2008年   302篇
  2007年   279篇
  2006年   247篇
  2005年   210篇
  2004年   199篇
  2003年   195篇
  2002年   230篇
  2001年   209篇
  2000年   233篇
  1999年   204篇
  1998年   208篇
  1997年   192篇
  1996年   191篇
  1995年   165篇
  1994年   149篇
  1993年   173篇
  1992年   169篇
  1991年   171篇
  1990年   166篇
  1989年   118篇
  1988年   106篇
  1987年   111篇
  1986年   127篇
  1985年   185篇
  1984年   137篇
  1983年   126篇
  1982年   106篇
  1981年   131篇
  1980年   113篇
  1979年   116篇
  1978年   120篇
  1977年   63篇
  1976年   82篇
  1975年   62篇
  1973年   65篇
  1972年   59篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
Endogenous Group Formation   总被引:1,自引:0,他引:1  
While the rules governing the formation of groups engaging in collective action may have significant impact on group size and behavior of members, most experiments on public goods have been conducted with the subjects in exogenously fixed groups or of fixed sizes. We study endogenous formation of groups in a public‐goods provision game by allowing subjects to change groups under three sets of rules: free entry/exit, restricted entry with free exit, and free entry with restricted exit. We find that the rules governing entry and exit do have a significant impact on individual behavior and group‐level outcomes.  相似文献   
93.
The links between the fuel and energy complex and the consolidated budget of Irkutsk oblast are examined; the budget balance of income and expenditure is evaluated in relation to the development of the fuel and energy complex; and factors affecting the budget proceeds from the energy sector and the related energy-intensive sectors are analyzed.  相似文献   
94.
95.
This article uses a survey of insurance agents in Florida to examine the manner in which insurance agents use and view the Internet as a method of marketing insurance products. The results of the survey suggest that the agents’ use of the Web and their attitudes toward the Web do not vary by demographic characteristics (including age, education level, gender, and income). In addition, the agents’ perception of the Internet as a threat (rather than an opportunity) does not vary by age or education level and is not correlated with their attitudes toward the use of the Web. However, while Internet marketing and other means of direct selling are viewed by the agents as equal threats to their sales, the agents believe that such marketing by other companies is a greater threat than that done by the companies they represent.  相似文献   
96.
The end of the cold war has elevated environmental issues to the highest level of concern for humanity while creating a world order dominated by the United States of America and other Western nations. This new power structure may likely lead to increased business activity in many parts of the world, as nations formerly preoccupied with the cold war turn their attention to economic development. This paper examines the linkages among ethics, economic development and protection and restoration of the environment in The New World Order.Emily F. Carasco is Associate Professor at the Faculty of Law of the University of Windsor. Her research focus is on international law and family law.Jang B. Singh is Associate Professor at the Faculty of Business Administration of the University of Windsor. His research focus is on ethical issues involved in the management process.  相似文献   
97.
We investigate intraday bid‐ask spreads (BAS), volatility, and trading activity of thinly traded equity index futures contracts on the Singapore Exchange. Contrary to previous findings, we find a rather flat BAS pattern during the trading day. However, consistent with past findings, an increase in risk widens the spread and a higher trading activity reduces it. When trading occurs in a day, spreads are reduced. No significant difference in volatility between days with and without trades was detected. When trades occur, quote revisions increase, and it is positively related to the number of trades. An increase in the number of quote revisions increases the likelihood of a transaction, and when quotes are current, revisions that are accompanied by trades carry new information. We provide evidence that contracts that are thinly traded may possess liquidity attributes as long as their price quotes remain current. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:455–486, 2003  相似文献   
98.
An Internet presence is a critical early component in the process of building towards a fully operational and unified e‐commerce strategy. E‐commerce has significantly impacted logistics/supply chain strategies and the development and implementation of a website have become key issues for many firms within the transportation industry. This study provides an overview of website content within the motor carrier industry. Content analysis was used to assess the site design, informational content, and the interactive content of 152 motor carrier websites, and to compare the features offered on the Top 100 motor carrier firm websites with those offered on the sites of smaller carrier firms.  相似文献   
99.
A model to simulate the costs and returns of an individual dairy cow over 14 years under various assumptions of genetic potential, health status and management was developed especially to evaluate the effects of diseases that reduce production and reproduction efficiency and to evaluate alternative management interventions. Data were collected from the Food Animal Health Resource Management System (FAHRMX), Today's Electronic Planning (TELPLAN), Today's Electric Farm Accounting (TELFARM) databases and secondary sources at Michigan State University. A case study of cystic ovaries was analysed using the model. The results showed that it is more economical to treat cystic ovaries than not to treat, and treatment with Gonadotropin Releasing Hormone (GNRH) was superior to Human Chrionic Gonadotropin (HCG). Four to five lactations were the optimum for keeping a dairy cow to replacement and it was estimated that there is a loss of US$0.45 per day of extended calving interval (days open beyond the optimal 70 days).  相似文献   
100.
The economic impact of adopting herd health programs for mastitis and reproduction by small-scale dairy producers of Central Thailand was assessed using a policy analysis matrix (PAM). Following a reduction in the incidence of bovine disease on adopter farms, an increase in private net profits is observed. More importantly the social costs of supporting dairy farmers is reduced; the PAM effective protection coefficient was reduced by 35% for mastitis program adopters and by 44% for reproductive program adopters, indicating improved social efficiency of dairy policy. Other indicators of efficiency and policy implications are discussed.  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