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   10105篇
  免费   290篇
  国内免费   1篇
财政金融   1831篇
工业经济   856篇
计划管理   1761篇
经济学   2252篇
综合类   225篇
运输经济   60篇
旅游经济   190篇
贸易经济   1600篇
农业经济   428篇
经济概况   1162篇
信息产业经济   1篇
邮电经济   30篇
  2020年   128篇
  2019年   163篇
  2018年   208篇
  2017年   244篇
  2016年   223篇
  2015年   158篇
  2014年   212篇
  2013年   961篇
  2012年   295篇
  2011年   297篇
  2010年   279篇
  2009年   317篇
  2008年   286篇
  2007年   269篇
  2006年   216篇
  2005年   191篇
  2004年   190篇
  2003年   200篇
  2002年   166篇
  2001年   203篇
  2000年   218篇
  1999年   180篇
  1998年   174篇
  1997年   208篇
  1996年   181篇
  1995年   182篇
  1994年   167篇
  1993年   168篇
  1992年   197篇
  1991年   193篇
  1990年   153篇
  1989年   152篇
  1988年   125篇
  1987年   121篇
  1986年   128篇
  1985年   181篇
  1984年   157篇
  1983年   172篇
  1982年   139篇
  1981年   174篇
  1980年   145篇
  1979年   162篇
  1978年   135篇
  1977年   122篇
  1976年   129篇
  1975年   109篇
  1974年   105篇
  1973年   87篇
  1972年   66篇
  1971年   59篇
排序方式: 共有10000条查询结果,搜索用时 500 毫秒
91.
This study investigated how partners' self-reported opportunism and shared decision making varied by culture in international joint ventures (IJVs) with the Japanese. Data were gathered by a mail survey of senior officials in IJVs located in 11 host countries. Significant differences were found between partners from Western cultures and the Japanese, but not between other Asians and the Japanese. Indirect effects suggest that shared decision making neutralizes cultural tendencies toward opportunism. Results indicated that opportunistic tendencies did not diminish as the IJV relationship aged, and that shared decision making did diminish as the relationship aged.  相似文献   
92.
Can economically efficient outcomes be obtained and sustained in the absence of externally enforced property rights? We study the evolutionary properties of a game that exhibits two well-defined Nash equilibria: one generates an inefficient outcome while the other set generates an efficient outcome supported by the potential for retaliation. Although standard forward-looking refinements eliminate the efficient equilibrium, neither equilibrium type satisfies strict evolutionary stability criteria. However, both types of equilibrium define strategies that are neutrally stable, which makes them vulnerable to drift in dynamic environments. We conduct computer simulation experiments in which players learn adaptively via a tournament selection mechanism called sophisticated experimentation. Our simulations demonstrate that while the system spends a disproportionately high proportion of time in the inefficient equilibrium set, the efficient equilibrium is pervasive as the system drifts back and forth between the equilibrium sets, never settling on one or the other.  相似文献   
93.
A model to simulate the costs and returns of an individual dairy cow over 14 years under various assumptions of genetic potential, health status and management was developed especially to evaluate the effects of diseases that reduce production and reproduction efficiency and to evaluate alternative management interventions. Data were collected from the Food Animal Health Resource Management System (FAHRMX), Today's Electronic Planning (TELPLAN), Today's Electric Farm Accounting (TELFARM) databases and secondary sources at Michigan State University. A case study of cystic ovaries was analysed using the model. The results showed that it is more economical to treat cystic ovaries than not to treat, and treatment with Gonadotropin Releasing Hormone (GNRH) was superior to Human Chrionic Gonadotropin (HCG). Four to five lactations were the optimum for keeping a dairy cow to replacement and it was estimated that there is a loss of US$0.45 per day of extended calving interval (days open beyond the optimal 70 days).  相似文献   
94.
95.
Estimation in the interval censoring model is considered. A class of smooth functionals is introduced, of which the mean is an example. The asymptotic information lower bound for such functionals can be represented as an inner product of two functions. In case 1, i.e. one observation time per unobservable event time, both functions can be given explicitly. We mainly consider case 2, with two observation times for each unobservable event time, in the situation that the observation times can not become arbitrarily close to each other. For case 2, one of the functions in the inner product can only be given implicitly as solution to a Fredholm integral equation. We study properties of this solution and, in a sequel to this paper, prove that the nonparametric maximum likelihood estimator of the functional asymptotically reaches the information lower bound.  相似文献   
96.

The fluctuations in the rate of returns of the Bombay stock exchange are analyzed through wavelet transform. The fluctuations, in various time scales, naturally separated by the wavelets, are subjected to statistical analysis. The localization and multiresolution properties of the wavelets enable one to identify collective behaviour in the stock market and the extent of their influence at various time scales. The Gaussian nature of the rate of returns at certain scales and the periodic nature of the same, at other scales, are clearly brought out by this analysis. The utility of this approach for modeling purpose is also elucidated.

  相似文献   
97.
Abstract.  In this paper we examine the determinants of the allocation of Canadian bilateral aid over the period 1984–2000. We draw on models of donor behaviour that allow us to incorporate humanitarian, commercial and political considerations – the 'trinity of mixed motives'– that affect Canadian aid. We find that allocations are moderately altruistic. Recipient country human rights and membership in the Commonwealth and La Francophonie also affect aid flows. Most strikingly, our results suggest that Canadian aid flows became less altruistic over this period and commercial motives became increasingly important. JEL Classification: H50, O10  相似文献   
98.
An extensive collection of continuous-time models of the short-term interest rate is evaluated over data sets that have appeared previously in the literature. The analysis, which uses the simulated maximum likelihood procedure proposed by Durham and Gallant (2002), provides new insights regarding several previously unresolved questions. For single factor models, I find that the volatility, not the drift, is the critical component in model specification. Allowing for additional flexibility beyond a constant term in the drift provides negligible benefit. While constant drift would appear to imply that the short rate is nonstationary, in fact, stationarity is volatility-induced. The simple constant elasticity of volatility model fits weekly observations of the three-month Treasury bill rate remarkably well but is easily rejected when compared with more flexible volatility specifications over daily data. The methodology of Durham and Gallant can also be used to estimate stochastic volatility models. While adding the latent volatility component provides a large improvement in the likelihood for the physical process, it does little to improve bond-pricing performance.  相似文献   
99.
Benartzi and Thaler [The Quarterly Journal of Economics 110 (1995) 73–92] offer a quasi-rational explanation for the equity premium puzzle. We reconsider their methodology and, making a simple modification to it, find that their analysis is not robust.  相似文献   
100.
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