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   10595篇
  免费   395篇
财政金融   2203篇
工业经济   1047篇
计划管理   1834篇
经济学   2233篇
综合类   94篇
运输经济   130篇
旅游经济   222篇
贸易经济   1765篇
农业经济   582篇
经济概况   877篇
邮电经济   3篇
  2023年   70篇
  2021年   85篇
  2020年   173篇
  2019年   244篇
  2018年   256篇
  2017年   275篇
  2016年   257篇
  2015年   202篇
  2014年   300篇
  2013年   1232篇
  2012年   348篇
  2011年   394篇
  2010年   353篇
  2009年   432篇
  2008年   426篇
  2007年   366篇
  2006年   374篇
  2005年   319篇
  2004年   304篇
  2003年   317篇
  2002年   288篇
  2001年   254篇
  2000年   248篇
  1999年   225篇
  1998年   211篇
  1997年   217篇
  1996年   185篇
  1995年   178篇
  1994年   166篇
  1993年   157篇
  1992年   139篇
  1991年   134篇
  1990年   116篇
  1989年   105篇
  1988年   98篇
  1987年   108篇
  1986年   83篇
  1985年   130篇
  1984年   154篇
  1983年   140篇
  1982年   121篇
  1981年   94篇
  1980年   103篇
  1979年   95篇
  1978年   71篇
  1977年   69篇
  1976年   65篇
  1975年   38篇
  1974年   51篇
  1973年   49篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
This study investigates the relative roles of bond ratings and financial information in the setting of bond yields. Structural equation modeling techniques are used to learn whether ratings determine yields or whether both ratings and yields are determined by a concurrent set of economic and financial factors. Tests of alternative structural model configurations provide evidence regarding the associations between bond ratings, financial information, and bond yields. Both ratings and financial information are found to play an important role in determining bond yields. In addition, yields are consistent with the higher rating in cases of split ratings.  相似文献   
52.
53.
This paper empirically tests valuation models for the mortgage-backed futures-options contracts that traded on the Chicago Board of Trade (CBOT) from June of 1989 until March of 1992. A simple contingent-claim model is shown to produce call option values on mortgage-backed futures (MBF) contracts that are unbiased estimates of actual futures-options prices. The ability of the MBF contract to hedge positions in current coupon Government National Mortgage Association (GNMA) securities relative to the effectiveness of cross-hedging GNMA positions with T-note and T-bond futures contracts is also examined.  相似文献   
54.
Endogenous Timing in Trade Policy Games: Should Governments Use Countervailing Duties? - Trade policy under oligopoly is analysed in two multistage games with endogenous timing of trade policy. At the beginning of the games, the domestic and foreign governments choose whether to set trade policy at stage one or two. It is shown that in the subgame perfect equilibrium of both games, the domestic government will set its tariff (and production subsidy) at stage one and the foreign government its export subsidy at stage two. The domestic country commits not to use a countervailing duty in both games, and both countries are better off than when they set trade policy simultaneously.  相似文献   
55.
A study of the location of three classifications of high-tech industries in rural areas was undertaken using ordinary least squares, Tobit, and a two-step estimation procedure suggested by Heckman (1976). The results indicate that the location decision for high tech firms is influenced primarily by the county population, adjacency to an SMSA, and the expenditures on public infrastructure (exclusive of education expenditures). However, location near interstate highways was generally not a significant factor. Results were similar between branch and unit (single ownership) plants. Some differences in signs of orders of magnitude occurred among the estimation procedures. Making a choice between Tobit and Heckman approaches depends upon the goal of the research.  相似文献   
56.
57.
This paper investigates interactions between exporting and productivity at the firm level, using a panel of firms in the UK chemical industry. This is both highly technology intensive and the UK’s largest exporting sector. We find exporters are more productive than non-exporters, but are also on average smaller. This superior productivity performance among exporters appears to be caused by both self-selection and learning-by-exporting effects. In contrast to other studies, we find learning effects are significantly positive among new entrants, weaker for more experienced exporters and negative for established exporters. JEL no. F14, D21, L65  相似文献   
58.
Diversification Categories in Investment Real Estate   总被引:3,自引:0,他引:3  
This paper continues previous work evaluating the benefits of diversification and analyzes the various dimensions within the commercial real estate opportunity set. The database is large and extends through the 1982 downturn in property values. Due to the low levels of systematic risk, current distinctions by region and property type make little sense in a world of costly diversification. More exacting categories combining property type, SMSA growth rate and lease maturity offer promise for more efficient diversification within the real estate portfolio.  相似文献   
59.
The UK gas industry has undergone major changes since it was privatised in 1986 as a fully integrated monopoly. The most significant of these has occurred not as a result of the privatisation legislation but by the intervention of the ordinary competition authorities in support of an active industry regulator. While price capping continues to be used as the primary instrument for welfare protection against the still substantial monopolistic powers of the incumbent, new competition (which has been positively encouraged) has had the greater impact on prices and choice. Recently, however, the regulator has encouraged the use of auctions for the sale of storage capacity. This paper considers the merits of auctions and makes a tentative evaluation of their effectiveness. Further use of auctions is recommended but reserve prices are considered inappropriate where monopoly power still remains.  相似文献   
60.
Abstract.  We use tax‐based longitudinal microdata for 1982–99 to (i) examine how earnings distributions have shifted, (ii) identify changes in earnings mobility patterns, and (iii) replicate and update Beaudry and Green's cohort analysis of age‐earnings profiles. We find: (i) increased polarization of men's earnings and marked decline in real earnings of workers aged 20–4; (ii) general decline in men's earnings mobility, while women's mobility has increased for young and prime‐age workers; and (iii) upward drift in earnings profiles of 1960s–1970s entry cohorts and downward shifts for 1980s–1990s cohorts (largely confirming Beaudry and Green's findings), but suggestive of steepening profiles for the 1990s cohorts. JEL classification code : J31,O33  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