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   134357篇
  免费   3845篇
  国内免费   1篇
财政金融   25318篇
工业经济   11516篇
计划管理   21343篇
经济学   28593篇
综合类   1431篇
运输经济   961篇
旅游经济   2488篇
贸易经济   23324篇
农业经济   6096篇
经济概况   16889篇
信息产业经济   9篇
邮电经济   235篇
  2021年   835篇
  2020年   1615篇
  2019年   2379篇
  2018年   2314篇
  2017年   2496篇
  2016年   2702篇
  2015年   2090篇
  2014年   3397篇
  2013年   15309篇
  2012年   4173篇
  2011年   4085篇
  2010年   3650篇
  2009年   4291篇
  2008年   3852篇
  2007年   3187篇
  2006年   3554篇
  2005年   3520篇
  2004年   3100篇
  2003年   2855篇
  2002年   2833篇
  2001年   2575篇
  2000年   2487篇
  1999年   2399篇
  1998年   2241篇
  1997年   2295篇
  1996年   2161篇
  1995年   1950篇
  1994年   1979篇
  1993年   1943篇
  1992年   1994篇
  1991年   1875篇
  1990年   1781篇
  1989年   1650篇
  1988年   1585篇
  1987年   1583篇
  1986年   1665篇
  1985年   2420篇
  1984年   2289篇
  1983年   2079篇
  1982年   1948篇
  1981年   1880篇
  1980年   1853篇
  1979年   1780篇
  1978年   1616篇
  1977年   1619篇
  1976年   1376篇
  1975年   1271篇
  1974年   1183篇
  1973年   1186篇
  1972年   895篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
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   
152.
153.
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   
154.
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   
155.
156.
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   
157.
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   
158.
159.
许多情况说明,用于组织中数据存储的消费已经成爆炸状态。产生这种情况的主要因素是电子邮件和电子商务对数据的质量和数量的要求提高了,并且这种数据大部分是分散的、非结构性的,这就增加了对组织中数据管理的要求。本文是在澳大利亚进行的一次调查的基础上做出的,该调查是关于组织中如何处理数据增长和由于数据增长所带来的问题。调查的结果显示人们对该问题表现出高度的关注,同时显示出一种乐观的趋势,即技术将对未来出现的各种各样的问题提供解决方案。  相似文献   
160.
The open door policy of China’s economic reform since the 1980s has attracted heavy foreign direct investment (FDI) flows into China and especially to Guangdong (particularly the Pearl River Delta region, PRD) and induced significant economic growth during the past two decades. While there exist various classical theories of FDI in attempting to identify the determinants of FDI inflow and to explain the behavior of FDI flows, limited attention has been given from the perspective of agglomeration effects generated by a core-periphery (CP) relation.This paper intends to study the impacts of agglomerations on FDI inflows in the context of Krugman’s CP relation (1991) by investigating (1) the formation of a CP relation via gravity model analysis; (2) whether different types of industry FDI flows will respond differently in the CP-system, given agglomeration effects; and (3) whether FDI origin and firm scale matter in affecting FDI flows.A database consisting of a population frame of 37,742 firm-level manufacturing and services joint ventures investing in Guangdong in 1998 was used. Empirical results show that the agglomerations of the CP relation have affected FDI flow patterns. While both manufacturing and services FDI and sources of investment responded differently to the impacts, smaller firms were found more responsive to the CP-agglomeration settings regardless of FDI by industry type and by source. The significance and implications of the CP-system to further facilitate FDI in the region are discussed.  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