全文获取类型
收费全文 | 54109篇 |
免费 | 741篇 |
国内免费 | 2篇 |
专业分类
财政金融 | 10072篇 |
工业经济 | 3450篇 |
计划管理 | 8357篇 |
经济学 | 12145篇 |
综合类 | 946篇 |
运输经济 | 235篇 |
旅游经济 | 653篇 |
贸易经济 | 10045篇 |
农业经济 | 1922篇 |
经济概况 | 6303篇 |
信息产业经济 | 45篇 |
邮电经济 | 679篇 |
出版年
2021年 | 207篇 |
2020年 | 390篇 |
2019年 | 614篇 |
2018年 | 2900篇 |
2017年 | 2753篇 |
2016年 | 1941篇 |
2015年 | 554篇 |
2014年 | 914篇 |
2013年 | 3809篇 |
2012年 | 1488篇 |
2011年 | 2994篇 |
2010年 | 2678篇 |
2009年 | 2560篇 |
2008年 | 2469篇 |
2007年 | 2734篇 |
2006年 | 935篇 |
2005年 | 1131篇 |
2004年 | 1227篇 |
2003年 | 1308篇 |
2002年 | 1016篇 |
2001年 | 781篇 |
2000年 | 829篇 |
1999年 | 699篇 |
1998年 | 698篇 |
1997年 | 701篇 |
1996年 | 689篇 |
1995年 | 625篇 |
1994年 | 628篇 |
1993年 | 654篇 |
1992年 | 681篇 |
1991年 | 701篇 |
1990年 | 561篇 |
1989年 | 483篇 |
1988年 | 497篇 |
1987年 | 490篇 |
1986年 | 526篇 |
1985年 | 775篇 |
1984年 | 722篇 |
1983年 | 659篇 |
1982年 | 644篇 |
1981年 | 634篇 |
1980年 | 637篇 |
1979年 | 564篇 |
1978年 | 486篇 |
1977年 | 413篇 |
1976年 | 362篇 |
1975年 | 411篇 |
1974年 | 312篇 |
1973年 | 320篇 |
1972年 | 237篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
J. A. L. Cranfield 《Revue canadienne d'agroeconomie》2003,51(3):299-321
Optimal investment rules are developed for a producer agency investing in domestic-market generic advertising, export market promotion, and cost-of-production-reducing research. These rules are derived assuming either maximization of producers' surplus or social surplus. The form of the optimality rules differs according to which objective is pursued. Fixed producer agency budgets are also allowed by incorporating a constraint limiting total expenditure on the three activities. Addition of such a constraint substantially alters the structure of the optimal investment rules. Differences in these rules highlight the importance of accounting for the financing mechanism when modeling optimal checkoff fund investment decisions. Optimality rules are simulated using data for the Canadian beef sector. Results suggest historic underinvestment in domestic-market generic advertising but overinvestment in export market promotion. Sensitivity of simulation results underscores the difficulty in assessing optimality of historic producer investment in cost-of-production-reducing research. 相似文献
105.
This paper analyzes the dynamic relationship between primary and secondary mortgage markets and the short-term and long-term market interest rates. Using a series of monthly data on fixed rate mortgage rates and GNMA rates, we explore the dependence and speed of adjustment in these primary and secondary mortgage rates to each other as well as to the long and short-term government rates. The results indicate that residential mortgage rates in general, appear to follow the long-term rate and are not very sensitive to movements in the short-term interest rate. 相似文献
106.
107.
108.
abstract We examine how cognitive style, as measured by the MBTI, affects strategic decision outcomes. Executives participated in a simulated strategic decision making environment that allowed controlled collection of decision outcomes, including manager decisiveness, decision quality, and perceived effectiveness. We found that iNtuiting/Thinking managers used their intuition to make cognitive leaps based on objective information to craft more decisions of higher quality than other managers. In contrast, Sensing/Feeling types used time to seek socially acceptable decisions, which led to the lowest number of decisions and the lowest perceived effectiveness of all. We found no effect on decisiveness or perceived effectiveness based on a manager's preference for Perceiving or Judging. However, we found that others perceived Extraverted managers as being more effective than Introverted managers when, in fact, the Extraverts were no more decisive than Introverts. Thus, cognitive style influences actual decision outcomes as well as how others perceive one's decision performance. 相似文献
109.
This paper evaluates the two well-known final waste disposal methods, incineration and landfilling. In particular we compare the social cost of two best-available technologies using a point estimate based on private and environmental cost data for the Netherlands. Not only does our comparison allow for Waste-to-Energy incineration plants but for landfills as well. The data provide support for the widespread policy preference for incineration over landfilling only if the analysis is restricted to environmental costs alone and includes savings of both energy and material recovery. Gross private costs, however, are so much higher for incineration, that landfilling is the social cost minimizing option at the margin even in a densely populated country such as the Netherlands. Furthermore, we show that our result generalizes to other European countries and probably to the USA. Implications for waste policy are discussed as well. Proper treatment of and energy recovery from landfills seem to be the most important targets for waste policy. Finally, WTE plants are a very expensive way to save on climate change emissions. 相似文献
110.
Carl R. Chen 《The Journal of Financial Research》2001,24(2):309-310
Emerging Financial Markets, by David O. Beim and Charles W. Calomiris. McGraw‐Hill/Irwin, 2001, 364 pages, price $75.00. 相似文献