全文获取类型
收费全文 | 1822篇 |
免费 | 139篇 |
国内免费 | 24篇 |
专业分类
财政金融 | 201篇 |
工业经济 | 116篇 |
计划管理 | 501篇 |
经济学 | 333篇 |
综合类 | 194篇 |
运输经济 | 14篇 |
旅游经济 | 15篇 |
贸易经济 | 327篇 |
农业经济 | 106篇 |
经济概况 | 178篇 |
出版年
2024年 | 5篇 |
2023年 | 30篇 |
2022年 | 26篇 |
2021年 | 34篇 |
2020年 | 40篇 |
2019年 | 47篇 |
2018年 | 47篇 |
2017年 | 49篇 |
2016年 | 49篇 |
2015年 | 78篇 |
2014年 | 165篇 |
2013年 | 160篇 |
2012年 | 167篇 |
2011年 | 157篇 |
2010年 | 151篇 |
2009年 | 113篇 |
2008年 | 112篇 |
2007年 | 108篇 |
2006年 | 88篇 |
2005年 | 66篇 |
2004年 | 51篇 |
2003年 | 41篇 |
2002年 | 39篇 |
2001年 | 27篇 |
2000年 | 26篇 |
1999年 | 22篇 |
1998年 | 22篇 |
1997年 | 15篇 |
1996年 | 11篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 6篇 |
1992年 | 6篇 |
1991年 | 9篇 |
1990年 | 5篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有1985条查询结果,搜索用时 343 毫秒
11.
LIU Shan-qing 《美中经济评论(英文版)》2007,6(5):48-52,38
The planter history of Gannan navel orange might trace to 1970s, up to now underwent in more than 30 years. Approximately, the development historical division on the Gannan navel orange is 4 stages. The natural environment factor, the customer factor, and the political factor have played crucial roles in the formation and development of GNOCIC. Among them, the rich natural resource and the superior geographical environment are the material base. And government's support is the main propelling force. The customers' expense is the final decision strength by chance which it develops, expands. 相似文献
12.
We extend the concept of piecewise linear histogram introduced recently by Beirlant, Berlinet and Györfi. The disadvantage of that histogram is that in many models it takes on negative values with probability close to 1. We show that for a wide set of models, the extended class of estimates contains a bona fide density with probability tending to 1 as the sample size n increases to infinity. The mean integrated absolute error in the extended class of estimators decreases with the same rate n–2/5 as in the original narrower class. 相似文献
13.
方位零值标校是识别器设邸统标校的一项重要内容。针对机动平台识别器设备进场安装,提出了几种标校方法,旨在解决机动平台识别器的方位零值标校问题。 相似文献
14.
公司兼并和收购市场中企业控制权机机制、控制权争夺的价值、控制权争夺的福利效应、大股东在公司控制权争夺中对公司政策产生影响。外部性排除了负有义务的股东完全取得接管收益的可能性,无论控制权争夺的结果如何,股东财富在控制权争夺其间是增加的。从股东的福利效应方面来说,控制权争夺的失败也就是股东财富的损失。大股东提高了预期利润,并且他们所占股份越多,则提高越大。董事会的失误导致了敌意接管的出现,可由公司控制的外部市场对董事会的疏忽作用进行弥补。 相似文献
15.
Robustness issues in multilevel regression analysis 总被引:8,自引:0,他引:8
A multilevel problem concerns a population with a hierarchical structure. A sample from such a population can be described as a multistage sample. First, a sample of higher level units is drawn (e.g. schools or organizations), and next a sample of the sub‐units from the available units (e.g. pupils in schools or employees in organizations). In such samples, the individual observations are in general not completely independent. Multilevel analysis software accounts for this dependence and in recent years these programs have been widely accepted. Two problems that occur in the practice of multilevel modeling will be discussed. The first problem is the choice of the sample sizes at the different levels. What are sufficient sample sizes for accurate estimation? The second problem is the normality assumption of the level‐2 error distribution. When one wants to conduct tests of significance, the errors need to be normally distributed. What happens when this is not the case? In this paper, simulation studies are used to answer both questions. With respect to the first question, the results show that a small sample size at level two (meaning a sample of 50 or less) leads to biased estimates of the second‐level standard errors. The answer to the second question is that only the standard errors for the random effects at the second level are highly inaccurate if the distributional assumptions concerning the level‐2 errors are not fulfilled. Robust standard errors turn out to be more reliable than the asymptotic standard errors based on maximum likelihood. 相似文献
16.
VARMA (vector autoregressive moving average) processes are proposed for modelling cointegrated variables. For this purpose the echelon form is combined with the error correction form. Procedures for estimating the Kronecker indices which characterize the echelon form and for specifying the cointegration rank are discussed. The asymptotic distribution of the coefficient estimators is given. An example based o n US macroeconomic data illustrates the procedure and demonstrates its feasibility in practice. 相似文献
17.
This paper reports on a study to compare self-reports during an interview with staff who attended a University health centre in Turkey, with the records of visits to the same health centre over the previous 12 months. Design of the study reflects the effects of importance of the event, duration since the event, frequency of the occurrence of the event, measurement scale of the event, and bounded and unbounded recalling. In order to assess the extent of recall error, responses to retrospective questions on health centre visits are compared with administrative records. Statistical models are proposed for short and long term human memory recall error effects on responses. 相似文献
18.
管理科学堪称西方文化精华,翻译介绍管理学著作是一件非常有意义的事情。由于翻译介绍的管理学理论和方法极有可能被企业奉为圭臬,翻译必须十分慎重和注重质量。本文通过对一些错误译文的分析,希望引起出版和翻译界对译文质量的重视。 相似文献
19.
The evidence presented in the paper rejects the twin deficit hypothesis for the Austrian current account balance during the
last two decades. The results are based on an estimate of a vector error correction model including quarterly data for the
current account balance and potentially relevant variables driving its dynamics. We compute the variance decomposition of
the current account's forecast error and its generalized impulse responses to shocks in the innovations of the system. The
results in favor of intertemporal expenditure reallocation cannot be reproduced within a second analysis including the current
account and a measure of net output, however. The estimated implicit current account balance, interpreted as the discounted
expected change in future net output, does not follow the actual behaviour of the current account.
First version received: June 1999/Final version received: March 2001 相似文献
20.