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   10624篇
  免费   320篇
  国内免费   10篇
财政金融   1958篇
工业经济   885篇
计划管理   1867篇
经济学   2386篇
综合类   183篇
运输经济   78篇
旅游经济   188篇
贸易经济   1662篇
农业经济   532篇
经济概况   1193篇
信息产业经济   1篇
邮电经济   21篇
  2023年   69篇
  2021年   94篇
  2020年   157篇
  2019年   223篇
  2018年   228篇
  2017年   254篇
  2016年   261篇
  2015年   172篇
  2014年   253篇
  2013年   1052篇
  2012年   369篇
  2011年   398篇
  2010年   354篇
  2009年   378篇
  2008年   343篇
  2007年   305篇
  2006年   279篇
  2005年   240篇
  2004年   216篇
  2003年   210篇
  2002年   246篇
  2001年   215篇
  2000年   239篇
  1999年   211篇
  1998年   212篇
  1997年   199篇
  1996年   211篇
  1995年   163篇
  1994年   153篇
  1993年   176篇
  1992年   176篇
  1991年   176篇
  1990年   169篇
  1989年   125篇
  1988年   113篇
  1987年   119篇
  1986年   128篇
  1985年   193篇
  1984年   145篇
  1983年   137篇
  1982年   113篇
  1981年   136篇
  1980年   121篇
  1979年   120篇
  1978年   121篇
  1977年   69篇
  1976年   86篇
  1975年   67篇
  1973年   66篇
  1972年   61篇
排序方式: 共有10000条查询结果,搜索用时 93 毫秒
91.
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   
92.
93.
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   
94.
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   
95.
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   
96.
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   
97.
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   
98.
This study examines how factor point systems have treated state government jobs, which are held disproportionately by women, minorities, and union members. The findings indicate that female jobs may gain from comparable worth pay proposals, but the gains are dissipated in actual pay; unionized and minority workers tend to lose both proposed and actual pay; and the dispersion of points and pay is narrowed for jobs covered by collective bargaining agreements  相似文献   
99.
In this paper we re-examine the effect of 12b–1 payments on mutual fund expense ratios by analyzing data from 1988 through 1991. The findings are consistent with previous studies that find charges are a dead-weight cost borne by shareholders. However, we show that this cost increases over time.  相似文献   
100.
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