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   143595篇
  免费   4115篇
  国内免费   1篇
财政金融   26858篇
工业经济   11880篇
计划管理   23160篇
经济学   31397篇
综合类   1528篇
运输经济   1028篇
旅游经济   2566篇
贸易经济   25081篇
农业经济   6353篇
经济概况   17520篇
信息产业经济   7篇
邮电经济   333篇
  2021年   937篇
  2020年   1769篇
  2019年   2540篇
  2018年   2679篇
  2017年   2895篇
  2016年   3016篇
  2015年   2283篇
  2014年   3604篇
  2013年   16077篇
  2012年   4514篇
  2011年   4518篇
  2010年   4032篇
  2009年   4650篇
  2008年   4174篇
  2007年   3535篇
  2006年   3756篇
  2005年   3743篇
  2004年   3301篇
  2003年   3083篇
  2002年   3011篇
  2001年   2782篇
  2000年   2684篇
  1999年   2540篇
  1998年   2422篇
  1997年   2428篇
  1996年   2308篇
  1995年   2104篇
  1994年   2135篇
  1993年   2097篇
  1992年   2135篇
  1991年   2052篇
  1990年   1916篇
  1989年   1744篇
  1988年   1671篇
  1987年   1668篇
  1986年   1764篇
  1985年   2530篇
  1984年   2432篇
  1983年   2220篇
  1982年   2093篇
  1981年   1997篇
  1980年   1965篇
  1979年   1890篇
  1978年   1692篇
  1977年   1648篇
  1976年   1408篇
  1975年   1306篇
  1974年   1203篇
  1973年   1194篇
  1972年   910篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
142.
The effects of competitive interactions on investment decisionsand on the dynamics of the price of a nonstorable commodityare studied in a model of incremental investment with time tobuild and operating flexibility. I find that an increase inuncertainty may encourage firms to increase their capacity.Furthermore, I show that it may be optimal to invest in additionalcapacity during periods in which part of the operational capacityis not being utilized. The impact of competition on the propertiesof the endogenous output price is dramatic. For example, I findthat price volatility may be increasing in the number of competitorsin the industry.  相似文献   
143.
The paper examines the relationship between transitory terms‐of‐trade shocks and private saving. Using a model allowing for nonseparability between the consumption of tradables and nontradables, the paper estimates the intertemporal elasticity of substitution while accounting for the intratemporal elasticity of substitution between the consumption of tradables and nontradables. Empirical analysis of data for five industrial countries indicates that in response to transitory terms‐of‐trade shocks, intertemporal substitution of consumption and intratemporal substitution of consumption between tradables and nontradables both have large effects on private saving.  相似文献   
144.
The American Psychological Association Task Force recommended that researchers always report and interpret effect sizes for quantitative data. However, no such recommendation was made for qualitative data. Thus, the first objective of the present paper is to provide a rationale for reporting and interpreting effect sizes in qualitative research. Arguments are presented that effect sizes enhance the process of verstehen/hermeneutics advocated by interpretive researchers. The second objective of this paper is to provide a typology of effect sizes in qualitative research. Examples are given illustrating various applications of effect sizes. For instance, when conducting typological analyses, qualitative analysts only identify emergent themes; yet, these themes can be quantitized to ascertain the hierarchical structure of emergent themes. The final objective is to illustrate how inferential statistics can be utilized in qualitative data analyses. This can be accomplished by treating words arising from individuals, or observations emerging from a particular setting, as sample units of data that represent the total number of words/observations existing from that sample member/context. Heuristic examples are provided to demonstrate how inferential statistics can be used to provide more complex levels of verstehen than is presently undertaken in qualitative research.  相似文献   
145.
146.
We consider the problem of estimating a probability density function based on data that are corrupted by noise from a uniform distribution. The (nonparametric) maximum likelihood estimator for the corresponding distribution function is well defined. For the density function this is not the case. We study two nonparametric estimators for this density. The first is a type of kernel density estimate based on the empirical distribution function of the observable data. The second is a kernel density estimate based on the MLE of the distribution function of the unobservable (uncorrupted) data.  相似文献   
147.
The performance of service industries in Canada has been lower than that of good industries over the last four decades, with noticeable exceptions such as for railways and telecommunication carriers. Service industries were less economically (and technically) efficient in that they generated less output value (quantity) per hour worked (level and growth) or per combined unit of labour and capital (multifactor productivity growth) than good industries. The relative output price of services declined slightly over time compared with goods. At the disaggregated level, changing relative output prices were substantial and proved to be an important factor explaining the relative satisfactory economic performance of many service industries despite their low technical performance. Nevertheless, the output share of service industries increased over that period, sustained, mainly, by the growing recourse of all firms to outsourcing of services.  相似文献   
148.
149.
In this paper, we argue that consideration of firm strategy can help illuminate the choices managers make between debt and equity financing. Within an industry, the form of competition that each firm chooses will determine the strategic value to the firm of maintaining financial slack. Our empirical analysis yields strong support for the proposition that financial slack should be a particularly critical strategic imperative for firms pursuing a competitive strategy premised on innovation. We also demonstrate that firms pursuing such a strategy that fail to recognize the value of financial slack are likely to perform poorly. Copyright © 2003 John Wiley & Sons, Ltd.  相似文献   
150.
Why Press Coverage of a Client Influences the Audit Opinion   总被引:2,自引:0,他引:2  
In this study I use an experiment to examine why auditors are more likely to issue going–concern opinions when the client has been the subject of negative press coverage prior to the date of the audit opinion. I find no evidence that negative press coverage increases auditors' perceptions of legal liability, as was suggested in the prior literature. I do find, however, that negative press coverage increases auditors' perception of a client's bankruptcy probability and this, in turn, leads auditors to modify the audit opinion. Because the press coverage presented in this study provides no new information, the results suggest that auditors react too strongly to redundant information. This over–reaction can result in inefficient allocation of audit resources and can have deleterious affects on clients. Accordingly, policy makers, auditors and their clients might be interested in how auditors' reliance on redundant information can be reduced.  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