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   5507篇
  免费   98篇
  国内免费   1篇
财政金融   511篇
工业经济   171篇
计划管理   471篇
经济学   593篇
综合类   43篇
运输经济   18篇
旅游经济   28篇
贸易经济   407篇
农业经济   151篇
经济概况   479篇
水利工程   2733篇
信息产业经济   1篇
  2018年   114篇
  2017年   111篇
  2016年   139篇
  2015年   71篇
  2014年   122篇
  2013年   396篇
  2012年   177篇
  2011年   165篇
  2010年   118篇
  2009年   112篇
  2008年   148篇
  2007年   189篇
  2006年   161篇
  2005年   136篇
  2004年   138篇
  2003年   84篇
  2002年   82篇
  2001年   88篇
  2000年   70篇
  1999年   77篇
  1998年   79篇
  1997年   84篇
  1996年   75篇
  1995年   61篇
  1994年   92篇
  1993年   75篇
  1992年   93篇
  1991年   71篇
  1990年   98篇
  1989年   80篇
  1988年   93篇
  1987年   73篇
  1986年   74篇
  1985年   94篇
  1984年   93篇
  1983年   75篇
  1982年   83篇
  1981年   89篇
  1980年   102篇
  1979年   103篇
  1978年   112篇
  1977年   91篇
  1976年   96篇
  1975年   89篇
  1974年   81篇
  1973年   88篇
  1972年   64篇
  1971年   68篇
  1969年   61篇
  1968年   69篇
排序方式: 共有5606条查询结果,搜索用时 0 毫秒
91.
The Index of Consumer Expectations (ICE), which includes expenditures on durable goods, has been adopted as a leading indicator of national economic activity. A rational expectations model of the ICE was developed and the economic determinants of consumers' expectations were estimated. Aggregate expenditures on durable goods were explained by an endogenous ICE and sentiment about current economic conditions. Consumers were more likely to purchase durable goods when they felt better off in the current period relative to the future.  相似文献   
92.
This study of a sample of home gardeners indicates that rules of thumb, or heuristics, are used to select between chemical pesticides and nonchemical alternatives. Such rules of thumb serve to simplify otherwise complicated choice decisions. Heuristics commonly used to choose pesticides include how safe, effective, efficacious, and economical they are, whereas for alternative products consumers more often take into account convenience, efficiency, competency, and handiness. Generally, in an overall ranking of 24 individual choice attributes, pesticies rank low on these attributes where alternatives rank high and vice versa. Gender, age, and years using pesticides are significantly correlated with pesticide selection.  相似文献   
93.
State attorneys general recently proposed mandatory disclosures for rental car advertising. This study investigates the effects of alternate disclosure statements on consumers' beliefs. The results suggest that a shorter disclosure statement may be as effective as the one proposed.  相似文献   
94.
95.
96.
97.
I. Caas  E. Ayuga  F. Ayuga 《Land use policy》2009,26(4):1173-1181
The purpose of this paper is to validate a model for predicting the public's preference for a landscape using simple statistical techniques. The model assigns numerical values to 42 landscape variables grouped into physical, aesthetic and psychological attributes. The landscape value is obtained using an additive value function. The results of the model on certain landscapes are compared with the preference expressed by the public in a survey of 183 people.The homogeneity of the survey responses was checked in each photograph. It was determined that means and standard deviations of the scores represent the true preference.A strong positive association was observed between preference and certain landscape attributes such as expression, soil use or colour. A marked negative association was detected with respect to landscape alterations.A linear regression was carried out to analyse the predictive capacity of the model. The independent variable was the global score assigned by the model to each photograph and the dependant variable was the mean of the scores assigned by the survey respondents. The high level of correlation obtained indicates that the model is a good predictor of the public's preferences in relation to the set of photographs shown in the survey.To complete the analysis of the model as a preference predictor, a multiple linear regression was carried out between the mean score obtained in the survey and the model elements. Attributes and variables that have the greatest influence on pubic preference were detected.  相似文献   
98.
99.
Support for the two-tier approach to income maintenance for the aged is becoming widespread. Two-tier formulas combine an income-conditioned bottom tier with an earnings-related top tier to achieve antipoverty and earnings replacement objectives. This paper first refutes the claim that the two-tier approach is generally more target-efficient in reaching the poor than is the earnings-related top tier with progressive replacement rates. Next, the paper compares the effectiveness of the two systems in terms of other goals. The paper concludes by showing that a top tier with a low tax on current income can virtually dominate a wide range of two-tier formulas.  相似文献   
100.
This paper uses input-output analysis to measure the impact of oil supply bases and oil construction on the economy of Shetland. The output, income and employment created in each local industry by oil activities is measured. Oil industry multipliers are derived. Possible negative effects of oil on the local economy are considered. Finally, a forecast is made of the impact of oil on the Shetland economy in 1985.  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