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   24461篇
  免费   689篇
财政金融   4304篇
工业经济   1674篇
计划管理   4332篇
经济学   5831篇
综合类   249篇
运输经济   198篇
旅游经济   365篇
贸易经济   4229篇
农业经济   1181篇
经济概况   2666篇
信息产业经济   3篇
邮电经济   118篇
  2023年   126篇
  2021年   177篇
  2020年   313篇
  2019年   503篇
  2018年   597篇
  2017年   634篇
  2016年   620篇
  2015年   419篇
  2014年   657篇
  2013年   2657篇
  2012年   860篇
  2011年   900篇
  2010年   801篇
  2009年   892篇
  2008年   828篇
  2007年   709篇
  2006年   655篇
  2005年   569篇
  2004年   503篇
  2003年   518篇
  2002年   459篇
  2001年   529篇
  2000年   492篇
  1999年   435篇
  1998年   496篇
  1997年   437篇
  1996年   434篇
  1995年   378篇
  1994年   384篇
  1993年   365篇
  1992年   376篇
  1991年   392篇
  1990年   334篇
  1989年   247篇
  1988年   256篇
  1987年   262篇
  1986年   243篇
  1985年   364篇
  1984年   363篇
  1983年   336篇
  1982年   288篇
  1981年   292篇
  1980年   284篇
  1979年   277篇
  1978年   224篇
  1977年   184篇
  1976年   187篇
  1975年   163篇
  1974年   152篇
  1973年   149篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
The disadvantage faced by low-income food consumers has long been recognized, with such groups likely to pay more for their food products, which are commonly limited in terms of range and quality. Such disadvantage stems not only from economic constraints, but also from geographical, sociodemographic and infrastructural factors, such as low car ownership levels (which limit mobility), age, family structure and infirmity. Issues of access and mobility are especially pertinent given that the majority of U.K. food retailers have sought to achieve increased market share through the pursuit of economies of scale, the inherent benefit of high margin maintenance, large format development and the relocation to edge-of-town/out-of-town and affluent suburban sites. To date, little attention in the form of research has been directed to examining strategies adopted by those on low incomes to address such circumstances. This paper outlines the initial findings of a wider longitudinal study that examines the activities of food co-operatives and food groups within the Glasgow area, which are run by, and are for the benefit of, those on low incomes. Through semi-structured interviews with relevant local government departments and funding bodies, management committees and volunteers involved in the daily operation of food groups, the initial aim was to identify the operational and organizational characteristics of food cooperative initiatives. The next stage was to determine what those involved perceived as the contribution made to the members and wider community, and finally, future opportunities for food cooperatives were identified. The results therefore, provide an invaluable insight, not only into the workings of food co-operatives, but also into the experience of those on low incomes in respect of food shopping. The research findings, perhaps ironically, provide a possible strategic direction for food retailers who, in the face of traditional market saturation, must identify new market growth opportunities within areas that they have previously neglected.  相似文献   
103.
104.
105.
106.
In applications of expected utility analysis, researchers are confronted with a choice among several utility functional forms. Subjective utility values and probability distributions for price and yield were elicited from Sri Lankan producers of minor export crops. Exponential quadratic and cubic utility functions were estimated. The choice of functional form was found to affect both the classification of risk attitudes and the prediction of harvesting strategy. The exponential function was the best predictor of harvesting strategy because it was the best predictor of mature harvesting. All three functions were equally poor predictors of premature harvesting.  相似文献   
107.
The political strength in the EC and UK of the belief that high levels of self-sufficiency make food supplies more secure is demonstrated and explained. The relationship is examined analytically and critically, taking particular account of the priority of food, adjustment costs, and linkages between agriculture and other sectors. The need for a policy of food security in Western Europe is discussed in relation to military, crop and trade uncertainties. Finally, the elements of a more rational policy, including measures of storage, procurement and production independence, are outlined.  相似文献   
108.
The historic focus of new products research has been on the ability of new products to enhance the profitability and competitive position of the innovating firm. In this article, Timothy Devinney shows that there exists an overlooked and potentially significant side effect associated with new product innovations: financial risk changes. He reports that significant financial risk changes occurred in approximately 50% of the new product announcements he examined. The magnitude of these financial risk changes translates into overestimates or underestimates of the firm's cost of capital by 17% to 18% and is strongly and positively related to the size of the firm and the firm's new product innovation activity.  相似文献   
109.
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   
110.
Present economic linkages between the European Union and East Asia are relatively underdeveloped despite the fact that a number of EU member states have deep historical associations within the region. It is imperative that EU business engages itself more intensively in East Asia if Europe is not to become marginalised in an emergent “Pacific century”. *** DIRECT SUPPORT *** A02GP109 00002  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