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   3404篇
  免费   117篇
  国内免费   2篇
财政金融   508篇
工业经济   105篇
计划管理   734篇
经济学   638篇
综合类   19篇
运输经济   16篇
旅游经济   25篇
贸易经济   1045篇
农业经济   45篇
经济概况   238篇
邮电经济   150篇
  2023年   23篇
  2022年   31篇
  2021年   35篇
  2020年   48篇
  2019年   53篇
  2018年   166篇
  2017年   160篇
  2016年   177篇
  2015年   115篇
  2014年   140篇
  2013年   364篇
  2012年   205篇
  2011年   148篇
  2010年   153篇
  2009年   120篇
  2008年   142篇
  2007年   96篇
  2006年   114篇
  2005年   130篇
  2004年   66篇
  2003年   71篇
  2002年   78篇
  2001年   74篇
  2000年   49篇
  1999年   34篇
  1998年   34篇
  1997年   28篇
  1996年   32篇
  1995年   26篇
  1993年   32篇
  1992年   25篇
  1990年   26篇
  1989年   21篇
  1988年   18篇
  1987年   26篇
  1986年   21篇
  1985年   30篇
  1984年   28篇
  1983年   24篇
  1982年   23篇
  1981年   22篇
  1978年   18篇
  1977年   16篇
  1976年   24篇
  1975年   20篇
  1974年   17篇
  1973年   18篇
  1972年   17篇
  1971年   24篇
  1970年   20篇
排序方式: 共有3523条查询结果,搜索用时 677 毫秒
91.
92.
The aim of the present study was to investigate consumers' awareness, acceptance and attitudes towards functional foods in Turkey. Eight hundred and eight people participated in this study: aged between 20 and 80 years, 38.5% were male and 61.5% were female. Participants were given a questionnaire and were asked to fill it in by themselves to minimize the influence of the interviewer. Results indicated that socio‐demographic characteristics such as age, education level and income level are important indicators of consumers' awareness and consumption of functional food. The results show that the female respondents were 2.987 times more aware of functional food than the male respondents. Similarly, the likelihood of respondents having awareness of functional food was 1.431 times greater among those who had a higher educational level than among those with a lower educational level. Consumers who used vitamin supplements were 1.228 times more aware of functional food than other consumers. The results show that older respondents were 3.395 times more aware of functional food than younger respondents. Respondents with a history of familial diseases were more likely than others to have consumed margarine with plant sterol, fruit juices fortified with vitamin C, and breakfast cereals fortified with vitamins and minerals. Those with a diet‐related problem were more likely to have consumed cholesterol‐lowering products than those without a problem. As a conclusion, this study has shown that socio‐demographic characteristics such as age, education and income levels, and prices are important indicators that influence consumers' awareness and consumption of functional food. These results suggest that this type of knowledge could affect consumers' interest in functional foods, and therefore educational strategies might be necessary to encourage the consumption of functional foods.  相似文献   
93.
94.
95.
96.
In this study, we suggest pretest and shrinkage methods based on the generalised ridge regression estimation that is suitable for both multicollinear and high-dimensional problems. We review and develop theoretical results for some of the shrinkage estimators. The relative performance of the shrinkage estimators to some penalty methods is compared and assessed by both simulation and real-data analysis. We show that the suggested methods can be accounted as good competitors to regularisation techniques, by means of a mean squared error of estimation and prediction error. A thorough comparison of pretest and shrinkage estimators based on the maximum likelihood method to the penalty methods. In this paper, we extend the comparison outlined in his work using the least squares method for the generalised ridge regression.  相似文献   
97.
98.
99.
Management Review Quarterly - This study systematically reviewed 21 quantitative and qualitative articles on the effect of entrepreneurship education in schools. We reviewed short-term effects,...  相似文献   
100.
Brühl  Volker 《Intereconomics》2020,55(1):54-61
Intereconomics - Libra — a global virtual currency project initiated by Facebook — has been the subject of many controversial discussions since its announcement in June 2019. This paper...  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