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   14889篇
  免费   283篇
财政金融   3016篇
工业经济   1115篇
计划管理   2297篇
经济学   3182篇
综合类   522篇
运输经济   96篇
旅游经济   220篇
贸易经济   2136篇
农业经济   720篇
经济概况   1856篇
信息产业经济   1篇
邮电经济   11篇
  2021年   81篇
  2020年   169篇
  2019年   264篇
  2018年   273篇
  2017年   289篇
  2016年   247篇
  2015年   201篇
  2014年   300篇
  2013年   1516篇
  2012年   364篇
  2011年   454篇
  2010年   418篇
  2009年   397篇
  2008年   433篇
  2007年   371篇
  2006年   285篇
  2005年   290篇
  2004年   304篇
  2003年   300篇
  2002年   306篇
  2001年   301篇
  2000年   345篇
  1999年   282篇
  1998年   291篇
  1997年   281篇
  1996年   253篇
  1995年   256篇
  1994年   254篇
  1993年   304篇
  1992年   277篇
  1991年   253篇
  1990年   232篇
  1989年   199篇
  1988年   190篇
  1987年   176篇
  1986年   188篇
  1985年   257篇
  1984年   320篇
  1983年   263篇
  1982年   253篇
  1981年   271篇
  1980年   239篇
  1979年   254篇
  1978年   207篇
  1977年   196篇
  1976年   177篇
  1975年   141篇
  1974年   145篇
  1973年   129篇
  1972年   88篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
101.
102.
103.
104.
105.
106.
Historically, major consideration given to product management has focused on research and development or the introductory stage of the product life cycle. The authors present an empirical study delineating the variables to be considered in the product elimination process. More specifically, the elimination process is evaluated under a situation of poor product performance despite a generally viable market. The basic objectives of the study were: to determine the significant variables in the product elimination process of the Small Appliance Industry; to determine the relative importance of the variables; to examine the interaction among variables. The data obtained through personal structured questionnaire interviews were analyzed and provided a ranking of twenty-six variables relevant to the elimination process. Moreover, the Johnson's Hierarchical Clustering Schemes was applied to determine the interaction among variables. The results indicate that profitability and financial variables are most significant in the elimination decision-process. Second, the primary clusters of importance are concerned with market share, market growth rate, consumer awareness, and competitive action.  相似文献   
107.
A bstract . Historians interested in 20th century American reform often seek to analyze the ideologies of political leaders separately from the institutions that these same leaders created. Such emphases on ideas, as opposed to actions, has, for example, led "revisionist" American historians to argue that the presidencies of Herbert Hoover and Franklin D. Roosevelt were "conceptually continuous." Our examination of the major social welfare programs undertaken by the federal government in the 1920s disputes this claim. Examination of the operations of the federal bureaucracy instead of the rhetoric of politicians demonstrates the existence of decided policy differences between the Hoover and Roosevelt eras. "Efficiency" analogues dominant during the Hoover era were replaced with "direct service-provider" approaches which created a clear distinction between private and public welfare programs. Elements of "continuity" between the two eras have been overdrawn. Background is provided for increased understanding of some of the policy implications of America's contemporary welfare debate—particularly about "rehabilitation" strategies and/or rationales for action in the social welfare field.  相似文献   
108.
B. D. Sharma  H. C. Gupta 《Metrika》1976,23(1):155-165
Summary In the study of information theoretic measures, additivity has been the basic requirement. However it is quite interesting to investigate the sub-additive measures. Starting from subadditivity for measures associated with a pair of distributions of a discrete random variable, it has been changed into an equality relation using another function of a pair of distributions., Under the sum property of the function and the measures, the relation is expressed in terms of a functional equation of which the most general complex solutions have been obtained. In terms of the real continuous solutions of the functional equation, the sub-additive measures of Relative information and Inaccuracy have been defined and characterized. Particular cases and simple properties particularly the convexities of some of these new measures have also been studied.  相似文献   
109.
A new reimbursement policy adopted by Medicare in 1983 caused financial difficulties for many hospitals and health care organizations. Several organizations responded to these difficulties by developing systems to carefully measure their costs of providing services. The purpose of such systems was to provide relevant information about the profitability of hospital services. This paper presents a new method of making hospital service selection decisions: it is based on an optimization model that avoids arbitrary cost allocations as a basis for computing the costs of offering a given service. The new method provides more reliable information about which services are profitable or unprofitable, and it provides an accurate measure of the degree to which a service is profitable or unprofitable. The new method also provides useful information about the sensitivity of the optimal decision to changes in costs and revenues. Specialized algorithms for the optimization model lead to very efficient implementation of the method, even for the largest health care organizations.  相似文献   
110.
Much research on internal labor markets has been hampered by the failure to differentiate the wide variety of ILMs, by accounts of their determinants that too heavily emphasize isolated causal factors, by the lack of detailed material describing the economic and organizational dimensions of their design and implementation, and by the neglect of managerial perceptions of and motivations for constructing ILMs. This paper presents detailed case studies of three organizations that have constructed very different ILMs. Based on this material, a model of the determinants of ILMs is developed that centers around the concepts of costs, commitment, and rewards and that attempts to assess the interactions of effects of markets and hierarchies on ILMs. The model is built on the premise that the underlying imperatives typically held to affect ILMs are inevitably filtered through managerial beliefs and the constraints on managerial decision making. The implications of these findings for theory and research on ILMs 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