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   24670篇
  免费   419篇
财政金融   4753篇
工业经济   1919篇
计划管理   3768篇
经济学   5347篇
综合类   632篇
运输经济   150篇
旅游经济   340篇
贸易经济   3552篇
农业经济   1300篇
经济概况   3303篇
信息产业经济   2篇
邮电经济   23篇
  2020年   241篇
  2019年   342篇
  2018年   390篇
  2017年   413篇
  2016年   370篇
  2015年   281篇
  2014年   402篇
  2013年   2379篇
  2012年   559篇
  2011年   681篇
  2010年   602篇
  2009年   644篇
  2008年   676篇
  2007年   554篇
  2006年   465篇
  2005年   490篇
  2004年   451篇
  2003年   501篇
  2002年   452篇
  2001年   500篇
  2000年   524篇
  1999年   447篇
  1998年   458篇
  1997年   477篇
  1996年   468篇
  1995年   438篇
  1994年   442篇
  1993年   451篇
  1992年   451篇
  1991年   449篇
  1990年   404篇
  1989年   326篇
  1988年   324篇
  1987年   295篇
  1986年   353篇
  1985年   483篇
  1984年   519篇
  1983年   468篇
  1982年   442篇
  1981年   466篇
  1980年   405篇
  1979年   430篇
  1978年   369篇
  1977年   328篇
  1976年   286篇
  1975年   252篇
  1974年   258篇
  1973年   219篇
  1972年   174篇
  1971年   144篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
961.
Abstract

We estimate the increased mortality and term life insurance costs for women who have a family history of breast or ovarian cancer. Using data from the medical literature on age-specific and family history-specific incidence rates, we develop double-decrement models to evaluate the actuarial impact of breast cancer and ovarian cancer in the family. We also calculate the increased mortality and term insurance costs for women who test positive for the BRCA1 or BRCA2 gene mutation. We find that the type of affected relative and her age at onset of the disease are key underwriting factors. We find substantial mortality increases (up to 100%) for women with two relatives with cancer and women with a first-degree relative who developed cancer at an early age. Mortality increases for women with the BRCA gene mutation reach 150%. While some females with a family history of cancer can be accepted at standard rates, others may need to be quoted substandard rates, depending on the underwriting policy of the company. Females with the gene mutation can possibly be accepted at a rate that incorporates a severe mortality surcharge.  相似文献   
962.
This study examines whether funds of hedge funds (FOHFs) provide superior before-fee performance through managers’ fund selection, style allocation, and active management abilities. Using reported holdings of Securities and Exchange Commission–registered FOHFs, we find that FOHF managers have fund selection abilities, as hedge funds held by FOHFs outperform their style indices and over half of the individual hedge funds in the Lipper Trading Advisor Selection System (TASS) database. We also find that FOHF managers add value through active management of FOHFs’ holdings, while evidence on their style allocation abilities is mixed. Our findings suggest that FOHFs generate superior before-fee performance and that FOHF managers’ skillset is broader than previously documented. Thus, our study helps explain why FOHFs continue to survive and suggests that FOHF fee structure reform merits consideration.  相似文献   
963.
This paper is essentially a summary of the book Measuring the Nation's Wealth (Volume 29, Studies in Income and Wealth, New York: National Bureau of Economic Research, 1964), which is the report of study directed by the author. The purpose o f the study was to assess the problems and possibilities of conducting a national census of real wealth as a basis for continuing wealth and balance sheet estimates for the U.S. economy, by major sector.
It is stressed that the balance sheets and wealth estimates should be designed as a consistent part of an integrated system of national income accounts. Thus, valuation (at market prices and/or depreciated replacement costs), sectoring, and type-of-asset detail in the basic data and derived estimates should be compatible with the flow estimates contained in the economic accounts. Consistency of stock and flow estimates facilitates analysis of inter-relationships, and is helpful in the estimation process.
It is recommended that in the U.S. asset data by broad categories be collected as part of the recurring economic censuses and other reporting systems, but that detail on fixed reproducible assets (construction and equipment) at cost, by year or period of acquisition, be obtained from a small sample of respondents in each industry. The detail would be useful in its own right, and also permit revaluation of the assets by use of price indexes and depreciation rates to a current depreciated replacement cost basis. Where feasible, respondent estimates of market values would also be obtained.
The proposal is thus a compromise between the Japanese 1955 sample survey of assets, and the detailed wealth inventory of the U.S.S.R. which was begun in 1959. Preliminary work is now underway in the U.S. federal statistical agencies to expand collection of asset data, and to prepare comprehensive wealth estimates in the framework of the national income accounts.  相似文献   
964.
965.
966.
967.
Ohne Zusammenfassung  相似文献   
968.
Companies implement preferred supplier programs to reduce their vendor relationships to a reasonable few. Consequently, vendors who do not effectively manage their customer-based relationships are strong candidates for deletion from a customer’s list of long-term suppliers. The emergence of preferred supplier programs suggests that businesses are beginning to formally recognize and reward differences between their qualified vendors. Vendor stratification is proposed as a framework for understanding the evolution of preferred vendor programs. With the growing interest in relationship marketing, a study was conducted to empirically examine the extent to which businesses use relationship quality perceptions to differentiate their qualified vendors. The findings support the notion that relationship quality is a higher-order construct that can be used as a basis for developing vendor stratification systems. The article concludes with a discussion of the managerial and research implications of the study findings. Michael J. Dorsch (Ph.D., University of Arkansas) is an associate professor of marketing at Clemson University. His research has been published in theJournal of the Academy of Marketing Science, theJournal of Business Research, and theJournal of Personal Selling and Sales Management, among others. His research interests include issues concerning relationship marketing and marketing research methods. Scott R. Swanson (Ph.D., University of Kentucky) is an assistant professor of marketing at East Carolina University. He previously spent 9 years as a purchasing executive and his research interets include issues related to services marketing, atmospherics, and marketing ethics. His research has been published in theJournal of Business to Business Marketing, theInternational Journal of Quality and Reliability Management, AMA Educators’ Proceedings, andRetailing: Theories and Practices for Today and Tomorrow. Scott W. Kelley (D.B.A., University of Kentucky) is an associate professor of marketing. His research has been published in theJournal of the Academy of Marketing Science, theJournal of Retailing, theJournal of Business Research, theJournal of Advertising, and theJournal of Personal Selling and Sales Management, among others. His research interests include issues concerning services marketing and marketing ethics.  相似文献   
969.
970.
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