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   3435篇
  免费   82篇
财政金融   586篇
工业经济   190篇
计划管理   470篇
经济学   852篇
综合类   82篇
运输经济   29篇
旅游经济   63篇
贸易经济   605篇
农业经济   204篇
经济概况   433篇
邮电经济   3篇
  2022年   23篇
  2021年   33篇
  2020年   64篇
  2019年   76篇
  2018年   109篇
  2017年   123篇
  2016年   103篇
  2015年   73篇
  2014年   110篇
  2013年   378篇
  2012年   145篇
  2011年   155篇
  2010年   126篇
  2009年   129篇
  2008年   117篇
  2007年   99篇
  2006年   91篇
  2005年   86篇
  2004年   71篇
  2003年   45篇
  2002年   61篇
  2001年   40篇
  2000年   65篇
  1999年   43篇
  1998年   49篇
  1997年   48篇
  1996年   45篇
  1995年   27篇
  1994年   42篇
  1993年   49篇
  1992年   46篇
  1991年   40篇
  1990年   39篇
  1989年   31篇
  1988年   41篇
  1987年   32篇
  1986年   27篇
  1985年   46篇
  1984年   50篇
  1983年   46篇
  1982年   43篇
  1981年   38篇
  1980年   32篇
  1979年   33篇
  1978年   28篇
  1976年   23篇
  1975年   24篇
  1974年   19篇
  1973年   30篇
  1972年   20篇
排序方式: 共有3517条查询结果,搜索用时 15 毫秒
71.
Some financial stress events lead to macroeconomic downturns, while others appear to be isolated to financial markets. We identify financial stress regimes using a model that explicitly links financial variables to macro‐economic outcomes. The stress regimes are identified using an unbalanced panel of financial variables with an embedded method for variable selection. Our identified stress regimes are associated with corporate credit tightening and with NBER recessions. An exogenous deterioration in our financial conditions index has strong negative effects in economic activity, and negative amplification effects on inflation in the stress regime. These results are obtained with a novel factor‐augmented vector autoregressive model with smooth‐transition regimes (FASTVAR).  相似文献   
72.
We perform peridogram based cycle analysis of firm capital structure and find evidence that firms’ leverage is both persistent and cyclical. The cyclicality of leverage is supported by the trade-off, pecking order and market timing capital structure theories (Korajczyk and Levy in J Financ Econ 68:75–109, 2003; Bhamra et al. in Rev Financ Stud 23:645–703, 2010). Although market timing theory research supports persistence, previous literature dictates that the trade-off and pecking order theories may predict either persistent or mean reverting leverage. Our tests reject mean reversion in favor of persistent and cyclical leverage. We corroborate pecking order theory literature that predicts leverage is persistent. In these models, when firms’ investment spending is below earnings, leverage decreases. In addition, we examine whether firms change their capital structure as a result of business and financial cycles. Since financial cycles last longer than business cycles, financial cycles should have a long term effect on leverage. Our findings confirm the persistent leverage business cycle models that suggest firms change their capital structure due to financial and credit cycles (Jermann and Quadrini in Am Econ Rev 102:238–271, 2012; Azariadis et al. in Rev Econ Stud 83:1364–1405, 2016). We conclude that leverage is persistent due to the cyclicality of the financing decision.  相似文献   
73.
74.
75.
76.
77.
Zusammenfassung Es wird ein Index definiert, der den Grad, in dem ein Intelligenz- oder Leistungstest die Eigenschaften und Bedingungen eines ideal-typischen Niveau-Tests erfüllt, kennzeichnet. Der Index variiert in den Grenzen von 0 bis 1, wobei der Wert 0 einem idealtypischen Schnelligkeitstest (Speed-Test) und der Wert 1 einem idealtypischen Niveau-Test entspricht. Dieser Index kann aufgrund einer einmaligen Testdurchführung bestimmt werden; er ist abh?ngig von der Zeitbegrenzung des Testes und vom Leistungsniveau der untersuchten Stichprobe. Es wird vorgeschlagen, einen Test mitw> > 0,7 als Niveautest, einen solchen mitw<0,3 als Schnelligkeitstest zu bewerten. Die Berechnung vonw wird an Hand bekannter Tests demonstriert und einige Anwendungsbeschr?nkungen er?rtert.
Summary An index (w) for determining a test as to its degree of being a speed or a power test is proposed varying like a coefficient of correlation from zero to one. This index may be derived from a single testing a posteriori. It is dependent on the given time limit and on the achievement level of the sample tested. From empirical evidence it is suggested to accept a test with an indexw>0,7 as a power test and a test withw<0,3 as a speed test. Numerical examples for calculatingw are given and some restrictions for its application are discussed.


Herrn Prof. H. Münzner (Berlin) danken die Verfasser für die Durchsicht des Manuskriptes und für seine wertvollen Anregungen.  相似文献   
78.
The Economic Forces Driving Food Safety Quality in Meat and Poultry   总被引:1,自引:0,他引:1  
This article examines the impact of regulation and market-driven private actions on food safety performance in the meat and poultry industries. We find that private actions account for about 80% and regulation about 20% of the overall reduction in the share of samples of cattle and hog carcasses, ground beef, and broilers testing positive for Salmonella if all regulation and private actions were increased by identical amounts.  相似文献   
79.
80.
In an article in the previous issue of JPIM , Vasudevan Ramanujam and Gerhard Mensch introduced the concept of mismatches in the perceptions and priorities of various functional specialists, staff and line managers, and senior managers. These mismatches highlight lack of agreement among key participants in the innovation management process within a given company and indicate problems that could hinder performance of the whole management interaction system. Here Mensch and Ramanujam explore the use of a new managerial instrument that can help technology driven companies that are caught in a stalemate in technology. The technique is designed to improve new product development and commercialization of new technology by diagnosing discrepancies in awareness, sense of urgency, and opinions on technological choices which may exist within the organization.  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