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   925篇
  免费   55篇
财政金融   152篇
工业经济   60篇
计划管理   172篇
经济学   263篇
综合类   5篇
运输经济   15篇
旅游经济   9篇
贸易经济   169篇
农业经济   37篇
经济概况   98篇
  2023年   3篇
  2022年   10篇
  2021年   18篇
  2020年   31篇
  2019年   39篇
  2018年   31篇
  2017年   41篇
  2016年   37篇
  2015年   26篇
  2014年   33篇
  2013年   103篇
  2012年   48篇
  2011年   39篇
  2010年   42篇
  2009年   40篇
  2008年   33篇
  2007年   28篇
  2006年   28篇
  2005年   20篇
  2004年   31篇
  2003年   26篇
  2002年   22篇
  2001年   27篇
  2000年   20篇
  1999年   12篇
  1998年   20篇
  1997年   17篇
  1996年   7篇
  1995年   9篇
  1994年   11篇
  1993年   9篇
  1992年   8篇
  1991年   9篇
  1990年   3篇
  1989年   8篇
  1988年   6篇
  1986年   5篇
  1985年   5篇
  1984年   5篇
  1983年   8篇
  1982年   9篇
  1981年   11篇
  1980年   6篇
  1979年   8篇
  1978年   7篇
  1977年   2篇
  1976年   2篇
  1974年   2篇
  1973年   2篇
  1972年   3篇
排序方式: 共有980条查询结果,搜索用时 31 毫秒
191.
How did the biological standard of living develop in Indonesia during colonial times? Did it increase substantially after decolonization? In our study, we use four sets of anthropometric data to construct time series of average human height since the 1770s. The paper observes a significant decline in heights in the 1870s, followed by only modest recovery during the next three decades, both of which are related to a sequence of disasters. Average heights increased from the 1900s and accelerated after World War II. The World Economic Crisis, the Japanese occupation and the war of independence in the 1930s and 1940s constituted a difficult period. Average height growth thereafter is related to improvements in food supply and the disease environment, particularly hygiene and medical care.  相似文献   
192.
Management of swine waste generated in the United States is a challenging problem facing engineers, farmers, scientists, regulators, and policy-makers. Technologies for processing and storing swine waste have not been fully developed and refined in a manner acceptable to the public and environmental regulators. The primary concerns with improperly disposed swine waste are the effects on human and livestock health, surface and groundwater quality, air quality, and conservation of nitrogen fertilizers (Hagenstein 2003 Hagenstein, P. R. 2003. Air Emissions from Animal Feeding Operations: Current Knowledge, Future Needs, Washington, D. C.: National Research Council, National Academy Press.  [Google Scholar]).

The purpose of this study is to demonstrate the concept of target costing by applying it to a very specific example: the production of biomethanol from swine manure. This study summarizes the analyses that outline a design and calculate a preliminary cost estimate for a proposed system for producing biomethanol from swine manure (initial process). In this study the target costing process is demonstrated with calculation of a target cost. This article also demonstrates an application of value engineering as a systematic, interdisciplinary examination of factors affecting the cost of a product so as to find means to fulfill the product's specified purpose at the required standards of quality and reliability and at an acceptable cost.

The article is organized as follows. First, the purpose of applying target costing methodology to the development of marketable by-products from swine manure is outlined. Next, target cost is calculated for biomethanol made from swine manure based on current methanol prices and currently available subsidies for biomethanol made from swine manure. A system for producing biomethanol from swine manure is described. The current cost is calculated for producing biomethanol. Concepts of value engineering are employed to reduce a significant cost component of the initial process resulting in Process II. Finally, value engineering is employed the second time to further reduce the cost of Process II yielding Process III.  相似文献   
193.
194.
Abstract

While residents’ perceptions of tourism development have been widely explored through a rational cost-benefit lens, little is known about residents’ emotional responses and their influences on resident support toward tourism development. By integrating cognitive appraisal theory and affect theory of social exchange, this study examines the psychological factors (cognitive appraisals, emotions, and commitment) that underlie residents’ behaviors toward Tourism Performing Arts (TPA) development. Based on a survey of 435 residents undertaken in Yangshuo, China, the results reveal that outcome desirability, fairness and coping potential are significant antecedents differentiating resident positive and negative emotional responses toward TPA developments. Commitment was found to moderate the relationship between resident negative emotions and supportive behaviors and played a significant role in shaping resident behaviors. Additionally, resident support was found to be influenced by negative emotions rather than positive emotional responses toward TPA development. The findings have implications for alleviating resident hostility, cultivating commitment toward specific types of tourism, reducing community conflicts and obtaining local support for sustainable tourism development.  相似文献   
195.
In this paper we provide an extensive classification of one- and two-dimensional diffusion processes which admit an exact solution to the Kolmogorov (and hence Black–Scholes) equation (in terms of hypergeometric functions). By identifying the one-dimensional solvable processes with the class of integrable superpotentials introduced recently in supersymmetric quantum mechanics, we obtain new analytical solutions. In particular, by applying supersymmetric transformations on a known solvable diffusion process (such as the Natanzon process for which the solution is given by a hypergeometric function), we obtain a hierarchy of new solutions. These solutions are given by a sum of hypergeometric functions, generalizing the results obtained in a paper by Albanese et al. (Albanese, C., Campolieti, G., Carr, P. and Lipton, A., Black–Scholes goes hypergeometric. Risk Mag., 2001, 14, 99–103). For two-dimensional processes, more precisely stochastic volatility models, the classification is achieved for a specific class called gauge-free models including the Heston model, the 3?/?2-model and the geometric Brownian model. We then present a new exact stochastic volatility model belonging to this class.  相似文献   
196.
In this article, we estimate the degree of substitution between enrolment into Disability Insurance (DI) and Unemployment Insurance (UI) in the Netherlands. Starting in the 1990s many policy measures aimed at reducing DI enrolment, and increase labour force participation. We quantify whether these policy measures have led to a reduction in hidden unemployment in DI. A side effect of the reforms may be increased pressure on UI. Therefore, we simultaneously estimate reverse substitution, that is, hidden disability in UI. To this end, we employ a sample of firms in the Dutch AVO database from the period 1993 to 2002. Using instrumental variables in a bivariate Tobit specification, we identify the hidden components in both respective schemes. The estimation results indicate that about 3% of all dismissals took place through DI, which implies that about one quarter of the DI enrolments observed in our sample in fact consists of hidden unemployment. We find no evidence for reverse substitution of disabled persons ending up in UI.  相似文献   
197.
This article examines the impact of the R&D fiscal incentive programme on R&D by Dutch firms. Taking a factor demand approach, we measure the elasticity of firm R&D capital accumulation to its user cost. Econometric models are estimated using a rich unbalanced panel of firm data covering the period 1996 to 2004 with firm specific R&D user costs varying with tax incentives. Using the estimated user cost elasticity, we perform a cost–benefit analysis of the R&D incentive programme. We find some evidence of additionality suggesting that the level based programme of R&D incentives in the Netherlands is effective in stimulating firms’ investment in R&D. However, the hypothesis of crowding out can be rejected only for small firms. The analysis also indicates that the level based nature of the fiscal incentive scheme leads to a substantial social deadweight loss.  相似文献   
198.
199.
The strategies of multinational firms increasingly rely in Asia Pacific Region on processes of socialising their employees, who are seeking to develop and reinforce a “global” company culture, without endangering the cultures of local subsidiaries. Specialists have coined the term “cross-cultural management”. A role of “company ambassador” is allocated to a new generation of international executives in Asia whose mission will be to play an effective role as interface between head office its the subsidiaries – and between the subsidiaries themselves – once they have been suitably “impregnated” with the company culture and the particular features of different markets.

The repeated experience of international mobility that executives live through means that the individual may well be living in conflict with previous identities. It is true to say that nobody stays long in an internationally mobile situation without running the risk of there being strong divergence between the domestic and residential worlds, the life of the community and the world of the company. This article has been written as a result of in-depth research into the way executives of a large French oil company built up their identities and as a result of a study examines intercultural learning based on French expatriates' experience in China. We consider how French expatriates experience China and what imaginary underlies their perception. Analysis of daily socialization and interaction processes shows intercultural competence develops along distinct immersion stages: immersion–adjustment, immersion–comprehension, and immersion–integration. Individually, adjustment and comprehension support intercultural practice. The ultimate immersion stage leads to enlightened pragmatism stemming from “nomadic intelligence”. Where a researcher in the social sciences or a business man might have expected to have found an homogenous international elite, international executives building an “international system”, the heterogeneous nature of the identity strategies of international executives give the lie to the myth of the large company as a space for the irreversible assimilation of its members. At an individual level, being an international executive is a unique way of living the experience abroad, or rather, several different ways of experiencing identity strategies linked to the manipulation of one's ethnicity in a context of significant geographical and functional mobility.  相似文献   
200.
In this paper we investigate model-independent bounds for exotic options written on a risky asset using infinite-dimensional linear programming methods. Based on arguments from the theory of Monge–Kantorovich mass transport, we establish a dual version of the problem that has a natural financial interpretation in terms of semi-static hedging. In particular we prove that there is no duality gap.  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