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   132059篇
  免费   3766篇
  国内免费   1篇
财政金融   25482篇
工业经济   10882篇
计划管理   21240篇
经济学   28993篇
综合类   1448篇
运输经济   881篇
旅游经济   2481篇
贸易经济   21487篇
农业经济   6076篇
经济概况   16608篇
信息产业经济   7篇
邮电经济   241篇
  2021年   827篇
  2020年   1624篇
  2019年   2368篇
  2018年   2296篇
  2017年   2484篇
  2016年   2653篇
  2015年   2079篇
  2014年   3397篇
  2013年   15243篇
  2012年   4172篇
  2011年   4083篇
  2010年   3651篇
  2009年   4282篇
  2008年   3853篇
  2007年   3180篇
  2006年   3535篇
  2005年   3530篇
  2004年   3071篇
  2003年   2779篇
  2002年   2761篇
  2001年   2511篇
  2000年   2362篇
  1999年   2193篇
  1998年   2071篇
  1997年   2080篇
  1996年   1959篇
  1995年   1971篇
  1994年   1969篇
  1993年   1947篇
  1992年   1941篇
  1991年   1854篇
  1990年   1711篇
  1989年   1574篇
  1988年   1501篇
  1987年   1516篇
  1986年   1590篇
  1985年   2354篇
  1984年   2249篇
  1983年   2041篇
  1982年   1909篇
  1981年   1896篇
  1980年   1863篇
  1979年   1764篇
  1978年   1592篇
  1977年   1582篇
  1976年   1348篇
  1975年   1238篇
  1974年   1161篇
  1973年   1148篇
  1972年   862篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Even though the link between perceived corporate social responsibility fit (PCSR‐fit) and corporate reputation has received much attention from scholars, this tradition has ignored that the underpinnings of this association vary depending on the particular characteristics of each industry under study. To delve into this matter, we investigate in the increasingly relevant context of controversial industries (CIs) how PCSR‐fit could enhance corporate reputation and which are the mediating mechanisms of this association. Our academic contribution is twofold. First, we find that controversial sectors indeed can increase corporate reputation through CSR activities. However, we find that to achieve this goal, the nature of PCSR‐fit should be different than what extant literature indicates, because companies in these settings should directly focus on avoiding or reducing their inherent controversial harm or impact. Second, we evidence that “CSR initiatives' legitimacy” and “situational skepticism” mediate the PCSR‐fit and corporate reputation relationship in CIs. Therefore, we further unravel the underpinnings of this association to advance what we know on the matter and aid practitioners in this particular context.  相似文献   
42.
43.
Integrating signalling theory and the portfolio diversity literature, we theorize that diversity in a firm's patent and alliance portfolios sends contrasting flow signals impacting its market value in a nuanced way. Diversity in an alliance portfolio mediates the patent portfolio diversity – market value relationship by suppressing the negative effect of patent portfolio diversity creating an overall positive effect. We test our mediation model on a longitudinal set of 225 US biopharmaceutical firms that were awarded 17,078 patents and participated in 37,744 alliances between 1990 and 2006. Our theory and findings contribute three novel insights. First, we demonstrate the value of a temporal lens in explaining why diversity in a firm's patent and alliance portfolios send flow signals that establish expectations among market observers and have performance implications. Second, establishing that patent and alliance portfolio diversity are temporally sequenced provides compelling evidence for the value of studying multiple types of portfolios, their temporal relationships and effects on firm outcomes. Third, since diversity in a firm's portfolios can send contrasting flow signals conditioned on the cognitive demands and proximity involved in interpreting the signals, firms that do not maintain a ‘signalling fit’ with market observers increase the probability of unintentional negative signalling effects.  相似文献   
44.
Recent decades have seen a fundamental shift in the nature of economic regulation in the United States. Unauthorized by congress, and largely unnoted in legal and academic circles, regulatory agencies such as the Federal Communications Commission have changed the regulatory process by linking otherwise unrelated regulatory issues. Examples include tying merger approval to firm commitments to engage in conceptually unrelated build‐outs and other projects of political importance. This linking of issues has several effects, the most prominent being (a) tying regulatory issues changes the outcomes obtained, plausibly in predictable ways; (b) tying in some circumstances allows regulators to extend their authority to issues for which they have little or no legal authority; and (c) tied regulatory bargaining fails to produce valid legal precedent for firm decision making. We provide an analysis of these conclusions by examining the increasing use of consent decrees, voluntary merger commitments, and merger conditions by the Federal Communications Commission, referencing our discussion with a simple model of joint bargaining applicable to regulatory practice.  相似文献   
45.
A widely held view in the accountancy profession and the donor community is that accounting and the accountancy profession play an essential role in economic development. However, our review of the academic literature finds limited empirical research evidence on the relation between accounting and the accountancy profession and economic development, including specifically whether any such relation is causal, and if so, the direction of the causality. Entities, including those comprising the donor community, policymakers, and professional accountancy organizations (PAOs), need evidence on the question of whether and how the accountancy profession contributes to economic development. Such research could assist donors in evaluating the outcomes of interventions aimed at building the capacity of PAOs in emerging and developing economies and inform future interventions. We summarize the limited academic research addressing the relation between PAOs and economic development and present insights from two roundtables facilitated by the International Association for Accounting Education and Research. We identify research opportunities and research design considerations. We hope our paper will stimulate accounting researchers to advance this literature.  相似文献   
46.
The paper retests the U-shaped relationship between happiness and age using the cross-classified multilevel regression procedure and the World Values Survey data. The analysis accounts for period and cohort effects. The results reconfirm the pattern that happiness is U-shaped in the life course. That is, happiness decreases from a high-point in young adulthood, reaches a low-point in midlife, and thereafter increases to arrive at another high-point in old age. The results show that the high-point of happiness in old age is lower than the high-point of happiness in young adulthood. That happiness does not return to its initial high-point after it drops to a low-point in midlife is perhaps another stylized fact in the relationship between happiness and age.  相似文献   
47.
This study estimates the price effects of horizontal mergers in the U.S. grocery retailing industry. We examine fourteen regions affected by mergers, including mergers in highly concentrated and relatively unconcentrated markets. We identify price effects by comparing markets affected by mergers to unaffected markets using difference‐in‐difference estimation with three different comparison groups, propensity score weights, and by using the synthetic control method. Our results are robust to the choice of control group and estimation technique. We find that mergers in highly concentrated markets are most frequently associated with price increases, and mergers in less concentrated markets are most often associated with price decreases.  相似文献   
48.
The objective of this paper is twofold. First, it develops a prediction system to help the credit card issuer model the credit card delinquency risk. Second, it seeks to explore the potential of deep learning (also called a deep neural network), an emerging artificial intelligence technology, in the credit risk domain. With real-life credit card data linked to 711,397 credit card holders from a large bank in Brazil, this study develops a deep neural network to evaluate the risk of credit card delinquency based on the client's personal characteristics and the spending behaviours. Compared with machine-learning algorithms of logistic regression, naive Bayes, traditional artificial neural networks, and decision trees, deep neural networks have a better overall predictive performance with the highest F scores and area under the receiver operating characteristic curve. The successful application of deep learning implies that artificial intelligence has great potential to support and automate credit risk assessment for financial institutions and credit bureaus.  相似文献   
49.
50.
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