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   25678篇
  免费   567篇
财政金融   4423篇
工业经济   1714篇
计划管理   4397篇
经济学   5940篇
综合类   256篇
运输经济   194篇
旅游经济   375篇
贸易经济   4690篇
农业经济   1186篇
经济概况   2787篇
信息产业经济   3篇
邮电经济   280篇
  2023年   134篇
  2021年   192篇
  2020年   333篇
  2019年   513篇
  2018年   657篇
  2017年   672篇
  2016年   664篇
  2015年   457篇
  2014年   697篇
  2013年   2807篇
  2012年   893篇
  2011年   937篇
  2010年   866篇
  2009年   914篇
  2008年   843篇
  2007年   729篇
  2006年   664篇
  2005年   588篇
  2004年   507篇
  2003年   528篇
  2002年   490篇
  2001年   543篇
  2000年   513篇
  1999年   442篇
  1998年   500篇
  1997年   439篇
  1996年   441篇
  1995年   375篇
  1994年   392篇
  1993年   370篇
  1992年   374篇
  1991年   396篇
  1990年   361篇
  1989年   270篇
  1988年   270篇
  1987年   276篇
  1986年   259篇
  1985年   370篇
  1984年   367篇
  1983年   356篇
  1982年   305篇
  1981年   301篇
  1980年   295篇
  1979年   294篇
  1978年   236篇
  1977年   193篇
  1976年   200篇
  1975年   177篇
  1974年   159篇
  1973年   155篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
891.
This paper examines the technical and economic situation in the sphere of services, long-term and recent tendencies, and the proportion of development among services in connection with the income of the population. Factors of the inequality in the consumption of paid services and the results of cross-country comparisons, as well as reasons for the slow growth of this sector, are investigated  相似文献   
892.
893.
As the development and use of automated systems for collaborative work grows, the need for a better understanding of these systems becomes more important. Our focus is on one type of system, a Group Support System (GSS) and, in particular, on one important aspect of a GSS—anonymity. A conceptual framework for the study of anonymity in a GSS is presented, which describes the general classes of variables and their relationships. These variables include the factors that influence anonymity in a GSS, types of anonymity, and the effects of anonymity on a message sender, receiver, group process, and outcome. Each of these variables is discussed with working propositions presented for important group process and outcome measures. The objectives of this article are to highlight the importance and complexity of anonymity, to act as a guide for empirical investigations of anonymity, and to influence future GSS development and use.  相似文献   
894.
895.
随着我国经济体制改革的深入进行,证券买卖方兴未艾,越来越多的人想知道有关证券方面的知识,了解证券市场的运行机制,从而进行证券买卖活动。  相似文献   
896.
The ongoing conversion of the economies of former socialist countries into market economies has so far suffered from the lack of a theory of system transformation (policy) which indicates the means of achieving the desired objectives and makes it possible to evaluate the transformation policies of individual countries. The following article outlines the essential aspects of such a theory.  相似文献   
897.
The primary objectives of this study were to examine changes in credit card usage and the amount of debt between 1982 and 1986 and to identify factors influencing the amount of and changes in consumer debt held by households. Personal interviews were completed in 1982 and again in 1986 with the money managers of households in a small midwestern town in the U.S.A. The sample consisted of the 123 households that were represented both in the 1982 and 1986 surveys. Paired-samples t-tests were used to identify changes over time. Significant differences were found between 1982 and 1986 total household assets and total amount of debt. Regression analysis indicated that significant predictors of the amount of consumer debt burden were age, net income, total assets, and the degree to which managers felt comfortable with debt. Younger money managers were more likely to make larger monthly debt payments and have more consumer debt. Households with larger incomes and higher levels of assets also had higher total debt. Significant predictors of change in debt burden over the 4-year period were change in net income and total assets, with year-end savings being negatively correlated with consumer debt.  相似文献   
898.
The purpose of this study was to find out if significant differences exist in patterns of expenditures between elderly and non-elderly consumers, taking poverty status into account. Cluster analysis was used to identify expenditure patterns. Four different expenditure patterns were found. Elderly middle-income and affluent households were more likely to belong to service-using cluster than non-elderly poor households. Nonelderly households were more likely to belong to shelter-dominated cluster than elderly households. Poor households were more likely to belong to homebound cluster, while non-poor households were more likely to belong to car-centred cluster.  相似文献   
899.
Smoking has been considered a health problem virtually since its introduction to Europe in the 1500's. At various times, laws were enacted to attempt to control smoking, while cultivation of tobacco became economically more and more important. The development of widespread recognition of the health consequences of smoking has led to numerous suggestions that cigarette advertising be banned. However, the First Amendment to the U.S. Constitution protects freedom of the press. Analysis of the legal issues involved in such a ban requires consideration of the entire trend of Supreme Court decisions in the area of commercial speech. While it is not possible at this time to predict exactly how the Court would rule in this area, a comprehensive regulatory effort to reduce tobacco consumption could probably include a ban on tobacco advertising.  相似文献   
900.
Metropolitan sales data from the 1977 Census of Retail Trade were analysed to test whether phosphate detergent bans increased consumer expenditure on clothing: positive effects were found for men's clothing and domestic fabrics (sheets and towels). In areas with medium water hardness the average annual cost in 1977 equalled $11·08 per household. For 1984, the equivalent cost was $14·17 per household. These results are consistent with laboratory studies that show decreased detergency associated with non-phosphate detergents and increased fabric wear associated with carbonate-built detergents, the principle substitute for phosphate detergents. The bans impose the largest cost on hard water areas. In both ban and non-ban areas in 1977 higher laundering costs were associated with higher water hardness. Analysis of 1972 data indicated that water hardness did not affect clothing expenditures significantly when detergents contained large amounts of phosphates.  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