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   7925篇
  免费   223篇
财政金融   1395篇
工业经济   590篇
计划管理   1418篇
经济学   1719篇
综合类   49篇
运输经济   96篇
旅游经济   129篇
贸易经济   1419篇
农业经济   329篇
经济概况   964篇
邮电经济   40篇
  2023年   38篇
  2022年   33篇
  2021年   55篇
  2020年   108篇
  2019年   138篇
  2018年   174篇
  2017年   203篇
  2016年   205篇
  2015年   145篇
  2014年   237篇
  2013年   829篇
  2012年   309篇
  2011年   326篇
  2010年   298篇
  2009年   335篇
  2008年   283篇
  2007年   249篇
  2006年   276篇
  2005年   247篇
  2004年   220篇
  2003年   222篇
  2002年   182篇
  2001年   179篇
  2000年   170篇
  1999年   155篇
  1998年   150篇
  1997年   147篇
  1996年   149篇
  1995年   106篇
  1994年   117篇
  1993年   126篇
  1992年   118篇
  1991年   95篇
  1990年   95篇
  1989年   86篇
  1988年   79篇
  1987年   68篇
  1986年   78篇
  1985年   110篇
  1984年   112篇
  1983年   82篇
  1982年   87篇
  1981年   70篇
  1980年   81篇
  1979年   68篇
  1978年   53篇
  1977年   49篇
  1976年   49篇
  1975年   36篇
  1973年   41篇
排序方式: 共有8148条查询结果,搜索用时 15 毫秒
81.
82.
83.
For the ten crop seasons 1979-80 to 1988-89, returns to producers in the Australian wheat industry were underwritten by a government-guaranteed price floor. Similar schemes operate in other rural industries (dairy, apples and pears, dried fruits). Although the underwriting provisions have only been triggered once (in the 1986-87 season), the provision of this scheme has acted to reduce the risk normally associated with returns to producers of wheat in all years of its operation. This reduction in risk has been granted free-of-charge by the Commonwealth Government. The guaranteed price can be viewed as a put option taken out by the Government on behalf of growers — it gives growers the option to sell to the Australian Wheat Board at this floor price. The aim of this paper is to apply to this underwriting arrangement the Black-Scholes formula for valuing options, in order to estimate the cost that growers would otherwise have had to pay to obtain cover (through put options) equivalent to the guaranteed price. We also estimate the magnitude of this form of assistance to the industry, which (until now) has not been taken into account unless the returns to growers fell below the guaranteed price.  相似文献   
84.
It is hypothesised that the mechanics of the agri-monetary system impose shocks on EC agricultural markets which influence the Community's agricultural trade flows. A model illustrating links between agri-monetary changes and trade flows of sugar is presented. Empirical tests suggest that agri-monetary changes influence the volume and timing of sugar trade. Hypotheses relating the strength of this influence to self-sufficiency and other factors specific to Member States are discussed, as are the welfare costs of agri-monetary trade distortions. Although these welfare costs are unlikely to spark agrimonetary reform, they could be given consideration in the reform made inevitable by the Single European Market.  相似文献   
85.
In a field experiment investigating age discrimination, pairs of men, aged 27 and 47, inquired about employment as waiters in towns across England, France, Germany and Spain. Statistically significant discrimination against the older waiter was found in all four countries, but it was considerably higher in France and Spain than in England and Germany.  相似文献   
86.
87.
88.
The causes and consequences of ‘denationalization’, that is, the shift from local to foreign ownership, are examined for the case of the Brazilian pharmaceutical industry. The negative consequences that have been attributed to denationalization by 'dependency theory' are substantiated, but only in part. It is argued that the most interesting contrasts are not between the behavior of foreign and local firms in the industry but between the private sector and a recently created state enterprise, and that future analysis of dependent capitalist development should focus on the interaction of the state and foreign capital.  相似文献   
89.
The bulk of the literature on the empirical validation of the purchasing power parity (PPP) has been based on cointegration, although on rare occasions band-spectrum analysis has also been used. The former is tied down to the use of ‘notional’ time in the analysis of systems away from equilibrium, and the latter is circumscribed by the Slutzky-Yule effect. Both these drawbacks are sought to be remedied in the present paper, which seeks to bring to bear upon the PPP a new approach derived from the concept of a time-varying spectrum. Both absolute and relative versions of the doctrine are tested for ten advanced economies over the post-1973 period. Uniform rejection of the PPP occurs with the US $ as base, but with centring on the DM, the evidence seems to be supportive of the PPP (in its relative version) for three European countries.  相似文献   
90.
Australia is the sixth largest producer of beef and the second largest exporter of beef. Average beef exports from Australia are approximately 65 per cent of the total amount of beef produced, about 1.3 million tonnes. Australia is particularly vulnerable to diseases that are not endemic to the country and could close or disrupt its export markets for beef. In this study, we construct a bioeconomic optimisation model of the Australian beef industry that captures production and consumption decisions, domestically and internationally, and the impacts on the beef industry of a potentially catastrophic disease, foot‐and‐mouth disease (FMD). This study analyses localised to large‐scale outbreaks and suggests that changes in economic surplus because of FMD range from a positive net gain of $57 million to a net loss of $1.7 billion, with impacts on producers and consumers varying depending on the location of the outbreak, control levels and the nature of any trade ban.  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