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   5000篇
  免费   153篇
财政金融   922篇
工业经济   420篇
计划管理   936篇
经济学   1085篇
综合类   47篇
运输经济   44篇
旅游经济   100篇
贸易经济   873篇
农业经济   204篇
经济概况   517篇
信息产业经济   1篇
邮电经济   4篇
  2023年   26篇
  2021年   41篇
  2020年   80篇
  2019年   100篇
  2018年   124篇
  2017年   144篇
  2016年   116篇
  2015年   87篇
  2014年   130篇
  2013年   624篇
  2012年   148篇
  2011年   194篇
  2010年   178篇
  2009年   214篇
  2008年   183篇
  2007年   169篇
  2006年   162篇
  2005年   148篇
  2004年   143篇
  2003年   155篇
  2002年   134篇
  2001年   113篇
  2000年   118篇
  1999年   122篇
  1998年   106篇
  1997年   82篇
  1996年   93篇
  1995年   73篇
  1994年   77篇
  1993年   72篇
  1992年   75篇
  1991年   82篇
  1990年   54篇
  1989年   37篇
  1988年   39篇
  1987年   45篇
  1986年   47篇
  1985年   67篇
  1984年   54篇
  1983年   49篇
  1982年   50篇
  1981年   50篇
  1980年   43篇
  1979年   41篇
  1978年   28篇
  1977年   25篇
  1976年   24篇
  1975年   19篇
  1974年   26篇
  1973年   18篇
排序方式: 共有5153条查询结果,搜索用时 0 毫秒
991.
992.
993.
Over the past decade, the distribution of household incomes has shifted so much that a much larger proportion of consumers now earn significantly higher-than-average incomes--while still falling short of being truly rich. As a result, what used to be a no-man's-land for new product introductions has in many categories become an extremely profitable "new middle ground." How can marketers capitalize on this new territory? The key, say the authors, is to rethink the positioning and design of offerings and the ways they can be brought to market. Take, for instance, how Procter & Gamble redefined the positioning map for tooth-whitening solutions. A decade ago, dental centers were popularizing expensive bleaching techniques that put the price of a professionally brightened smile in the 400 dollars range. At the low end, consumers also had the choice of whitening toothpastes that cost anywhere from 2 dollars to 8 dollars. P&G wisely positioned itself between the two ends, successfully targeting the new mass market with its 35 dollars Whitestrips. In product categories where it's clear the middle ground has already been populated, it's important for companies to design or redesign offerings to compete. An example is the Polo shirt. How do you sell a man yet another one after he's bought every color he wants? Add some features, and call it a golf shirt. Here, marketers have introduced designs based on the concept of "occasional use" in order to stand out. Finally, companies wishing to reach the "almost rich" can change how they go to market. Perhaps no mass retailer has made a stronger bid for the mass affluent than Target Stores, which has pioneered a focus the company itself characterizes as upscale discount. The strategy has made Target an everyday shopping phenomenon among well-heeled urbanites and prosperous professionals.  相似文献   
994.
We propose the use of machine learning methods to estimate inequality of opportunity and to illustrate that regression trees and forests represent a substantial improvement over existing approaches: they reduce the risk of ad hoc model selection and trade off upward and downward bias in inequality of opportunity estimates. The advantages of regression trees and forests are illustrated by an empirical application for a cross-section of 31 European countries. We show that arbitrary model selection might lead to significant biases in inequality of opportunity estimates relative to our preferred method. These biases are reflected in both point estimates and country rankings.  相似文献   
995.
996.
While it is crucial to understand the impact of regulatory changes on market risk, the literature does not show how risk responds to expected regulatory changes that are specifically designed to change risk. Our paper fills this gap by providing a detailed study of one such case. Using both a sample of privatized U.K. companies, and U.K. and U.S. control portfolios, between 1993 and 2000, we show (both for the single-factor market model and the three-factor Fama-French model) that the observed changes in market risk are significant and consistent with theory.  相似文献   
997.
No End to the Racial Wage Hierarchy in South Africa?   总被引:2,自引:0,他引:2  
The South African apartheid system formally ended with the election of the African National Congress at the first all-race elections held in 1994. As a result, racist policies such as color barring, that particularly hindered the advancement of black workers throughout the apartheid period, are no longer legal. Yet the legacy of apartheid may endure as a result of both the persistence of racial differences in human capital attributes and the possible continuation of discriminatory practices within employment. In this paper the authors examine the evolution of the racial wage hierarchy in the early post-apartheid era against the background of the long-term decline in racial wage disparities observed over the last years of the apartheid regime. They find evidence that the position of black workers between 1995 and 1997 actually deteriorated relative to the overall geometric mean wage, while that of colored, Asian, and white workers improved.  相似文献   
998.
正在市场环境瞬息万变的今天,为改变而改变一定是最优选择么?怎样调整才能既保留公司核心竞争力,又开拓新的领域?商海行舟,不进则退。不变革便衰败,只有挣脱束缚自己的枷锁才能更好地前行。当今世界日新月异,组织必须与时俱进以保证利润和市场份额的观念已深入人心,并被奉为金句。从百事达(Blockbuster)到柯达,从纸质报业到投币电话制造商,更给了我们"不变则死"的惨痛教训。各行各业也都有公司为自己的因循守旧埋了单。  相似文献   
999.
1000.
Zoning and Industrial Land Values: The Case of Philadelphia   总被引:1,自引:0,他引:1  
This paper examines the market effects of zoning. Using the hedonic framework, we perform an empirical analysis that shows that lots zoned for industrial use in our study area are associated with a 58% price discount. The paper highlights the outcome of static zoning policies in a dynamic world. As the demand for industrial land in Philadelphia declined (resulting in vacancies), prices fell, but zoning was slow to adjust, therefore land conversion did not occur to re-equilibrate.  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