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   8832篇
  免费   152篇
财政金融   1870篇
工业经济   643篇
计划管理   1409篇
经济学   1855篇
综合类   114篇
运输经济   55篇
旅游经济   176篇
贸易经济   1357篇
农业经济   332篇
经济概况   1167篇
邮电经济   6篇
  2020年   79篇
  2019年   126篇
  2018年   161篇
  2017年   164篇
  2016年   156篇
  2015年   109篇
  2014年   149篇
  2013年   994篇
  2012年   224篇
  2011年   256篇
  2010年   222篇
  2009年   241篇
  2008年   230篇
  2007年   178篇
  2006年   194篇
  2005年   171篇
  2004年   176篇
  2003年   171篇
  2002年   179篇
  2001年   165篇
  2000年   162篇
  1999年   158篇
  1998年   170篇
  1997年   165篇
  1996年   149篇
  1995年   120篇
  1994年   126篇
  1993年   140篇
  1992年   159篇
  1991年   163篇
  1990年   118篇
  1989年   118篇
  1988年   98篇
  1987年   111篇
  1986年   123篇
  1985年   160篇
  1984年   140篇
  1983年   168篇
  1982年   137篇
  1981年   123篇
  1980年   141篇
  1979年   128篇
  1978年   94篇
  1977年   108篇
  1976年   103篇
  1975年   101篇
  1974年   92篇
  1973年   79篇
  1972年   63篇
  1971年   62篇
排序方式: 共有8984条查询结果,搜索用时 15 毫秒
941.
This study uses heteroskedastic Tobit and Censored Least Absolute Deviations models to examine the impacts of dairy cow ownership on selected outcomes for a sample of 184 households in coastal Kenya. The outcomes examined include gross household cash income, gross non‐agricultural income, consumption of dairy products, time allocated to cattle‐related tasks, number of labourers hired and total wage payments to hired labourers. The number of dairy cows owned has a large and statistically significant impact on household cash income; each cow owned increased income by at least 53% of the mean total income of households without dairy cows. Dairy cow ownership also increases consumption of dairy products by 1.0 litre per week, even though most of the increase in milk production is sold. The number of dairy cows has no significant effect on total labour for cattle‐related tasks. However, in contrast to previous studies, labour allocation to cattle by household members decreases and labour requirements for dairy cows are met primarily by an increase in hired labour. Dairy cow ownership results in relatively modest increases in payments to hired labourers and the number of hired labourers employed. The large positive impacts on income and the substitution of hired for household labour in cattle care suggest that intensification of smallholder dairying can be beneficial as a development strategy in the region if disease and feed constraints are addressed.  相似文献   
942.
Bargaining is common in markets for heterogeneous goods and differences in bargaining power between buyer and seller affect the negotiated transaction price. Previous research has found systematic evidence in the housing markets that weak buyers pay higher prices and weak sellers receive lower prices for their homes. Earlier work has modeled the bargaining effect as a parallel shift in the hedonic function, implicitly assuming that attribute shadow prices were unaffected by the bargaining process. In this paper, we use a sample of home sales where the seller's bargaining power is weakened by the fact that the home is vacant at the time of sale to test whether the effect of bargaining is best captured by a shift in the hedonic constant or whether the attribute shadow prices vary as well. The question is significant for property valuation where estimation of the marginal value of an attribute is commonly used to adjust comparable sales data. We find strong confirmation that bargaining power influences the negotiated price. We also find evidence that bargaining power alters attribute prices, although we do not find a consistent pattern across markets.  相似文献   
943.
944.
945.
This study focuses upon the recently discontinued F-20 program of the Northrop Corporation. Northrop's strategic initiative is analyzed historically and comparatively, and the implications of the program failure are discussed with respect to government procurement policy, defense contracting, international trade and arms transfer, and global competition in aerospace.  相似文献   
946.
Prevention of chemical incidents is an important issue in the chemical petroleum industries. This issue is receiving focus and attention from a wide spectrum—Industry, Labor, Professional Associations, Environmental Groups Government and the Public. The purpose of this paper is to review the various regulatory initiatives and related activities regarding chemical process safety.  相似文献   
947.
Strategic Internet application trends in supply chain management   总被引:1,自引:0,他引:1  
The Internet is evolving as a powerful force in the new marketplace where the nexus of competition has changed from individual firms to efficient supply chain networks both between firms and within industries. This study explores Internet adoption patterns and operational applications in US supply chain networks. The data reveal that the integration of the Internet into supply chain management applications has increased and has moved away from indiscriminate application of novel Internet technologies towards becoming a focused endeavor with precise expectations and measurable goals. Specifically, the study finds that Internet usage within supply chains is maturing as evidenced by enhanced and increased productivity, reduced costs and increased profit for participating firms.  相似文献   
948.
949.
This article is concerned with the length of channels utilized to market industrial products. Several marketing scholars have proposed that the appropriate channel structure is a function of conditions associated with the market for the product, the nature of the product itself, and characteristics of the producer and middlemen. By means of a survey of industrial product manufacturers, this study identified six characteristics of middlemen, industrial markets, and industrial customers that appear to be significant influences on the length of channels used to distribute industrial products.  相似文献   
950.
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