全文获取类型
收费全文 | 36142篇 |
免费 | 714篇 |
国内免费 | 14篇 |
专业分类
财政金融 | 6764篇 |
工业经济 | 2653篇 |
计划管理 | 5576篇 |
经济学 | 7856篇 |
综合类 | 618篇 |
运输经济 | 258篇 |
旅游经济 | 677篇 |
贸易经济 | 5853篇 |
农业经济 | 1891篇 |
经济概况 | 4645篇 |
信息产业经济 | 1篇 |
邮电经济 | 78篇 |
出版年
2021年 | 211篇 |
2020年 | 379篇 |
2019年 | 605篇 |
2018年 | 726篇 |
2017年 | 777篇 |
2016年 | 768篇 |
2015年 | 471篇 |
2014年 | 817篇 |
2013年 | 3631篇 |
2012年 | 1030篇 |
2011年 | 1147篇 |
2010年 | 997篇 |
2009年 | 1093篇 |
2008年 | 1116篇 |
2007年 | 1013篇 |
2006年 | 868篇 |
2005年 | 778篇 |
2004年 | 765篇 |
2003年 | 721篇 |
2002年 | 752篇 |
2001年 | 680篇 |
2000年 | 703篇 |
1999年 | 645篇 |
1998年 | 627篇 |
1997年 | 637篇 |
1996年 | 629篇 |
1995年 | 573篇 |
1994年 | 566篇 |
1993年 | 618篇 |
1992年 | 617篇 |
1991年 | 610篇 |
1990年 | 520篇 |
1989年 | 456篇 |
1988年 | 418篇 |
1987年 | 457篇 |
1986年 | 461篇 |
1985年 | 692篇 |
1984年 | 675篇 |
1983年 | 630篇 |
1982年 | 589篇 |
1981年 | 554篇 |
1980年 | 563篇 |
1979年 | 511篇 |
1978年 | 402篇 |
1977年 | 385篇 |
1976年 | 321篇 |
1975年 | 333篇 |
1974年 | 282篇 |
1973年 | 270篇 |
1972年 | 187篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
E. A. Abramova D. R. Belousov K. V. Mikhailenko 《Studies on Russian Economic Development》2008,19(1):35-45
This article examines the economic outcome of 2006 and builds a forecast for 2007–2010. The medium-term development risks of the Russian economy are analyzed. 相似文献
22.
An issue in the pricing of contingent claims is whether to account for consumption risk. This is relevant for contingent claims on stock indices, such as the FTSE 100 share price index, as investor’s desire for smooth consumption is often used to explain risk premiums on stock market portfolios, but is not used to explain risk premiums on contingent claims themselves. This paper addresses this fundamental question by allowing for consumption in an economy to be correlated with returns. Daily data on the FTSE 100 share price index are used to compare three option pricing models: the Black–Scholes option pricing model, a GARCH (1, 1) model priced under a risk-neutral framework, and a GARCH (1, 1) model priced under systematic consumption risk. The findings are that accounting for systematic consumption risk only provides improved accuracy for in-the-money call options. When the correlation between consumption and returns increases, the model that accounts for consumption risk will produce lower call option prices than observed prices for in-the-money call options. These results combined imply that the potential consumption-related premium in the market for contingent claims is constant in the case of FTSE 100 index options. 相似文献
23.
The purpose of this essay is to examine psychoanalytically Argyris and Schon's contributions to organization theory and intervention. The author focuses his attention on the problem of individual and organizational resistance to change in the light of Argyris and Schon's cognitive psychological assumptions about learning, reasoning, and effectiveness. 相似文献
24.
25.
26.
27.
28.
29.
This paper applies principles of transition to land tenure and squatting in South Africa. Political transition in South Africa reassigned political property rights, which produced contestable, and rent‐seeking incentives for squatting as a means to privatize land and redistribute wealth. Government failure to establish and protect private property rights in a squatter camp resulted in common‐pool problems that resisted private and public resolution with consequent rent dissipation and social loss. In response to this retreat from duty, informal agents emerged to claim their own share of the prize. Without enforceable rules of capture, the growth of squatter camps in South Africa will continue. JEL classification: D7, H8, K1, K4, R1, R4. 相似文献
30.
Thomas L. Nordblom David J. Pannell Scott Christiansen Nerses Nersoyan Faik Bahhady 《Agricultural Economics》1994,11(1):29-42
Medic (Medicago spp.) pastures are widely grown in rotation with dryland cereal crops in Mediterranean climate zones of Australia. Attempts since the 1960's to introduce this system to Mediterranean west Asia and north Africa (the native region of medic) have not lead to significant adoption; farmers in the region recognize medic, but as a weed and natural pasture plant. This first detailed economic evaluation of the rotational medic system was conducted using a whole-farm linear programming model based on the agricultural system of north-west Syria. The model represents in detail impacts of rotation on yields, labor requirements of alternative farm activities, availability of family and hired labor, subsistence income requirements, livestock feed sources and uses at different times and a choice of sheep stocking rates. Biological data for the analysis are based on a large six-year cropping and grazing experiment near Aleppo on terra-rossa soil with rainfall mainly in winter and averaging about 330 mm annually. The trial compared a dryland medic-wheat system and traditional two-year rotations of wheat with: fallow, watermelon, lentil and vetch. Results indicate that, given current prices and yields from the trial, medic is less profitable than traditional rotations. The model was used to investigate situations in which medic would be economically preferred. Selection of a medic rotation by the model was found to be particularly sensitive to the area of the farm and the price of labor. On small farms, labor availability per hectare is high, favouring the production of labor intensive crops such as lentil and watermelon. On larger farms, labor costs of these enterprises are substantial, increasing the relative profitability of medic, especially if labor prices increase. Interestingly, the relative desirability of medic is more sensitive to its impact on subsequent wheat crops than to the level of pasture production. We also found that modest increases in the prices of sheep products (especially milk) have a major impact on the economic performance of medic. These insights will allow improved focusing and targeting of future research and extension activities. 相似文献