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   16214篇
  免费   443篇
财政金融   3091篇
工业经济   1368篇
计划管理   2764篇
经济学   3409篇
综合类   169篇
运输经济   137篇
旅游经济   335篇
贸易经济   2447篇
农业经济   803篇
经济概况   2130篇
信息产业经济   1篇
邮电经济   3篇
  2021年   117篇
  2020年   192篇
  2019年   254篇
  2018年   362篇
  2017年   355篇
  2016年   324篇
  2015年   229篇
  2014年   368篇
  2013年   1764篇
  2012年   490篇
  2011年   496篇
  2010年   474篇
  2009年   544篇
  2008年   463篇
  2007年   403篇
  2006年   370篇
  2005年   308篇
  2004年   324篇
  2003年   328篇
  2002年   312篇
  2001年   308篇
  2000年   355篇
  1999年   304篇
  1998年   282篇
  1997年   285篇
  1996年   262篇
  1995年   244篇
  1994年   233篇
  1993年   275篇
  1992年   251篇
  1991年   264篇
  1990年   245篇
  1989年   222篇
  1988年   213篇
  1987年   191篇
  1986年   221篇
  1985年   302篇
  1984年   272篇
  1983年   273篇
  1982年   232篇
  1981年   233篇
  1980年   250篇
  1979年   208篇
  1978年   176篇
  1977年   172篇
  1976年   153篇
  1975年   135篇
  1974年   120篇
  1973年   117篇
  1972年   88篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
992.
993.
An Infant Feeding Practices Study (IFPS) in 1982 in Kenya, which included a cross-sectional survey of a weighted sample of 980 low and middle income Nairobi mothers who had given birth in the previous 18 months, found that most women breastfeed their infants for long periods, but many introduce alternate feeding, especially infant formula, in the 1st 4 months (86 and 50% of the infants were breastfed at 6 and 15 months respectively, but 50% of the 2 month-olds and 63% of the 4 month-olds were receiving substitutes, mostly formula). This is done largely out of the belief that infant formula is an additional health benefit. A workshop to discuss the findings of the IFPS and other available data, and to make policy recommendations urged the adoption of a policy of protection, support and promotion of breastfeeding. Since breastfeeding is already widely prevalent in Kenya, protection of breastfeeding should receive the 1st priority in policy related to infant feeding. Attention should be directed at at least 2 influences which help undermine breastfeeding: widespread availability and promotion of breast milk substitutes. Support for breastfeeding is viewed as the 2nd policy priority. Situations where support can play a helpful role are, women's paid employment outside the home, hospital practices, maternal morbidity, and difficulties in breastfeeding. Since promotion is the least cost effective of the 3 options, and most Kenyan women are already motivated to breastfeed, this should be the last priority. Promotion includes reeduction of mothers to make them better aware of the benefits of breastfeeding. The workshop recommended the dissemination of appropriate information, consisting of standarized messages based on clearcut guidelines, using mass media techniques.  相似文献   
994.
In the Netherlands all gambling is forbidden except in a few cases specially mentioned in the law. Time and again specialists in probability theory or statistics are called upon to testify as experts in lawsuits against law evaders. This paper discusses the part played by the experts in such legal procedures. It is pointed out that according to Dutch jurisprudence there does not exist an exclusive distinction between games of chance and games of skill. A simple declaration by an expert that a given game is largely based on chance suffices to see the game sentenced as against the law. This and various other related questions are discussed in detail and illustrated by examples taken from personal experience in the courts.  相似文献   
995.
Part 1 of a two-part discussion of Prostate Cancer from an underwriting perspective, covers the epidemiology and screening for prostate cancer. Included is a "Primer on Screening Tests" that discusses problems with digital rectal exam (DRE) and prostate specific antigen (PSA) as screening tests. Approaches to enhancing the use of PSA for screening including age and race specific ranging, PSA density, PSA velocity, free PSA, and complexed PSA are discussed. Arguments for and against the use of PSA for prostate cancer are presented. The widespread use of PSA testing in the insurance setting is contrasted with cautious statements concerning general use of PSA in the clinical preventive care setting. In a future issue, Part 2 will cover staging and follow-up of treated prostate cancer.  相似文献   
996.
Colleges and universities in the US differ markedly in their access to economic resources. National data are used here to describe the resulting hierarchy that's reflected in schools' spending on their students, the prices those students pay, and the subsidies they get in consequence. Both historical data and projections based on recent institutional saving suggest that economic disparities among institutions and their students are increasing. In a final section, the paper asks what to make of this: what we can say about the right degree of institutional disparity – whether we have too much, too little, or about the right amount of differentiation.  相似文献   
997.
The area of sales compensation has remained relatively untouched by recent pressures for compensation reform. This article highlights some of the ways that sales organizations stumble in managing their compensation programs, and why it takes more than a simple tactical fix to address these problems effectively. The authors describe a more structured governance framework that not only identifies and resolves key sales compensation issues, but ultimately safeguards the effectiveness and financial integrity of the sales organization itself.  相似文献   
998.
999.
The traditional view of appointments to executive agencies isthat the president has virtual carte blanche in the selectionof personnel for his "team." Yet many formal models of appointmentsuggest that presidents must accommodate the policy preferencesof senators when making nominations. Several empirical studieshave confirmed that legislative preferences are a significantdeterminant of the ideology of appointees, but these studieshave focused on appointments to the federal judiciary; the researchhas not addressed appointments to executive agencies. Appointmentsto executive agencies from 1936 to 1996 are examined, by employinga special sample of appointees to those positions—thosewho have served in Congress at some point in their careers.For these "bridging" individuals, it is possible to analyzestrictly comparable measures of ideology for the appointees,their nominating presidents, and the senators who voted to confirmthem. A linear regression analysis provides significant supportfor the hypothesis that appointee ideology is affected by variationin the ideological tilt in Congress.  相似文献   
1000.
In recent years some OECD countries were successful in loweringthe unemployment rate substantially while other countries werenot. In this paper we investigate to what extent successfulcountries implemented a comprehensive set of institutional reforms.We present a theoretical framework to investigate the relationshipbetween unemployment and labor market institutions (LMI) suchas labor taxes, unemployment benefits, employment protection,union bargaining power and (de)centralization of bargaining.In our empirical analysis of data over the period 1960–99of 17 OECD countries we show that particular combinations ofLMI are responsible for low unemployment rates.  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