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   16125篇
  免费   406篇
财政金融   3061篇
工业经济   1235篇
计划管理   2693篇
经济学   3730篇
综合类   222篇
运输经济   110篇
旅游经济   231篇
贸易经济   2456篇
农业经济   746篇
经济概况   1989篇
邮电经济   58篇
  2021年   90篇
  2020年   187篇
  2019年   261篇
  2018年   297篇
  2017年   353篇
  2016年   328篇
  2015年   214篇
  2014年   354篇
  2013年   1653篇
  2012年   426篇
  2011年   510篇
  2010年   402篇
  2009年   536篇
  2008年   434篇
  2007年   408篇
  2006年   347篇
  2005年   361篇
  2004年   316篇
  2003年   377篇
  2002年   329篇
  2001年   316篇
  2000年   345篇
  1999年   348篇
  1998年   328篇
  1997年   324篇
  1996年   283篇
  1995年   272篇
  1994年   253篇
  1993年   269篇
  1992年   264篇
  1991年   268篇
  1990年   262篇
  1989年   221篇
  1988年   215篇
  1987年   210篇
  1986年   234篇
  1985年   288篇
  1984年   280篇
  1983年   270篇
  1982年   240篇
  1981年   250篇
  1980年   231篇
  1979年   247篇
  1978年   218篇
  1977年   201篇
  1976年   191篇
  1975年   150篇
  1974年   152篇
  1973年   138篇
  1972年   97篇
排序方式: 共有10000条查询结果,搜索用时 234 毫秒
71.
72.
73.
74.
This article estimates economies of scale for a sample of five cellular telephony firms in the United States. We reject constant returns to scale for all but the smallest firm studied; the remaining firms exhibit decreasing returns to scale. This finding suggests that scale economies cannot be used to justify the current regulated duopoly structure of United States cellular markets.  相似文献   
75.
This paper focuses on the construction of forecasts over long horizons where a typical long-horizon forecast might span four years using 20 to 40 years’ data. It is argued that the presence of persistence in the form of unit or near-unit autoregressive roots poses substantial difficulties for long-horizon interval and point forecasting. These difficulties may not be overcome even by efficient pre-testing or model-selection procedures and might, in general, lead to point forecasts with large asymptotic root mean squared errors and undesirably wide prediction intervals.  相似文献   
76.
77.
This paper surveys the theoretical and empirical literature on the relationship between advertising, fees and quality in the self–regulating professions. Much of the literature is derived from the perspective of advertising as an information–enhancing device, helping to reduce the information asymmetry between professional and client. This is consistent with the majority of the empirical studies which suggest that advertising tends to have a downward effect on professional fees, with little if any adverse effect on quality. There are, however, important issues of method and measurement which may lessen the force of this conclusion  相似文献   
78.
At the direction of the U.S. Senate subcommittee on Governmental Affairs, the general Accounting Office (GAO) conducted a survey of employee involvement practices within American companies. The population consisted of top management within Fortune's 500 largest manufacturing and 500 largest service companies. An analysis of the data examined three broad areas relating to employee involvement: (1) the existing organizational programs and processes such as personnel practices, information sharing, and training; (2) the degree of corporate participation in specific employee involvement programs including the reasons for undertaking employee involvement programs, and the perceived barriers to the implementation of employee involvement programs; and (3) the perceived effect of employee involvement on organizational operation as measured by changes in indicators of performance and activities within the internal business environment.  相似文献   
79.
In 1986 The O.M. Scott & Sons Company, the largest producer of lawn care products in the U.S., was sold by the ITT Corporation in a divisional leveraged buyout. The company was founded in Marysville, Ohio in 1870 by Orlando McLean Scott to sell farm crop seed. In 1900, the company began to sell weedfree lawn seed through the mail. In the 1920s, the company introduced the first home lawn fertilizer, the first lawn spreader, and the first patented bluegrass seed. Today, Scott is the acknowledged leader in the “do-it-yourself” lawn care market, with sales of over $300 million and over 1500 employees. Scott remained closely held until 1971, when it was purchased by ITT. The company then became a part of the consumer products division of the huge conglomerate, and operated as a wholly-owned subsidiary for 14 years. In 1984, prompted by a decline in financial performance and rumors of takeover and liquidation, ITT began a series of divestitures. Over the next two years, total divestitures exceeded $2 billion and, after years of substandard performance, ITT's stock price significantly outperformed the market. On November 26, 1986, in the midst of this divestiture activity, ITT announced that the managers of Scott, along with Clayton & Dubilier (C & D), a private firm specializing in leveraged buyouts, had agreed to purchase the stock of Scott and another ITT subsidiary, the W. Atlee Burpee Company. The deal closed on December 30. Clayton & Dubilier raised roughly $211 million to finance the purchase of the two companies. Of that $211 million, almost $191 milion, or 91% of the total, was debt: bank loans, subordinated notes, and subordinated debentures. The $20 million of new equity was distributed as follows: roughly 62% of the shares were held by a C & D partnership, 21% by Scott's new subordinated debtholders, and 17.5% by Scott management and employees. After this radical change in financial structure and concentration of equity ownership, Scott's operating performance improved dramatically. Between the end of December 1986 and the end of September 1988, sales were up 25% and earnings before interest and taxes (EBIT) increased by 56%. As shown in Table 1, this increase in operating earnings was not achieved by cutting back on marketing and distribution or R & D. In fact, spending on marketing and distribution increased by 21% and R & D spending went up by 7%. Capital spending also increased by 23%.  相似文献   
80.
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