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   24444篇
  免费   544篇
  国内免费   1篇
财政金融   4673篇
工业经济   1739篇
计划管理   3666篇
经济学   5393篇
综合类   388篇
运输经济   178篇
旅游经济   447篇
贸易经济   3699篇
农业经济   1283篇
经济概况   3466篇
信息产业经济   1篇
邮电经济   56篇
  2021年   141篇
  2020年   249篇
  2019年   422篇
  2018年   500篇
  2017年   508篇
  2016年   524篇
  2015年   299篇
  2014年   543篇
  2013年   2501篇
  2012年   724篇
  2011年   813篇
  2010年   674篇
  2009年   762篇
  2008年   731篇
  2007年   646篇
  2006年   580篇
  2005年   490篇
  2004年   516篇
  2003年   464篇
  2002年   520篇
  2001年   454篇
  2000年   464篇
  1999年   443篇
  1998年   416篇
  1997年   423篇
  1996年   418篇
  1995年   363篇
  1994年   369篇
  1993年   405篇
  1992年   416篇
  1991年   411篇
  1990年   345篇
  1989年   306篇
  1988年   297篇
  1987年   308篇
  1986年   314篇
  1985年   471篇
  1984年   442篇
  1983年   405篇
  1982年   381篇
  1981年   355篇
  1980年   395篇
  1979年   322篇
  1978年   276篇
  1977年   258篇
  1976年   200篇
  1975年   246篇
  1974年   195篇
  1973年   190篇
  1972年   135篇
排序方式: 共有10000条查询结果,搜索用时 390 毫秒
1.
Portuguese Economic Journal - A set of RLS-type models with ARMA and ARFIMA dynamics is estimated and compared in a forecasting exercise with ARFIMA, GARCH and FIGARCH models. It is an extension of...  相似文献   
2.
Growing urbanisation in South Africa is reflected in burgeoning Working class and informal township settlements on the fringes of its major towns and cities. Paired with this is an increasing reliance on cash as the primary means of economic transaction, which has in turn stimulated the growth of micro-enterprise business activities within the township context. This article discusses the findings of an eight-township small-area census which occurred between 2010 and 2013 in Cape Town, Johannesburg, Ekurhuleni and Durban townships representing 250 000 residents. The researchers were able to establish the scope and scale of informal food and drink retailing in these localities. Of the 10 049 micro-enterprises located in the study, some 3966 (or 39% of the total) trade in food. These include enterprises in primary production, fresh produce retailing, grocery retailing from house and spaza shops, and informal foodservice enterprises. Food is the basis for much township informal business and plays an important role in making food increasingly affordable and locally accessible, and in creating cash employment. The article builds on the knowledge base of the township informal economy role in bolstering food security needs for the marginalised.  相似文献   
3.
4.
5.
Most development projects encounter a highly uncertain entitlement process that is largely uncontrollable by developers. In this study, entitlement is modeled as a separate stage within a compound real option, where developers begin with minimal control (maximum risk) and each successful stage increases control (decreases risk). We solve the model analytically, provide three‐dimensional numerical comparisons, and empirically test the model's predictions using hand collected rezoning petitions. Our main result refines the classic development option model: developers first invest early (secure entitlements) in order to obtain the option to subsequently delay investment (construct the optimal building at the optimal time).  相似文献   
6.
During patent litigation, pay‐for‐delay (P4D) deals involve a payment from a patent holder of a branded drug to a generic drug manufacturer to delay entry and withdraw the patent challenge. In return for staying out of the market, the generic firm receives a payment, and/or an authorized licensed entry at a later date, but before the patent expiration. We examine why such deals are stable when there are multiple potential entrants. We combine the first‐mover advantage for the first generic with the ability of the branded manufacturer to launch an authorized generic (AG) to show when P4D deals are an equilibrium outcome. We further show that limiting a branded firm's ability to launch an AG before entry by a successful challenger will deter such deals. However, removing exclusivity period for the first generic challenger will not.  相似文献   
7.
Forward guidance can be provided as an unconditional promise, i.e. commitment to a specific low policy rate. Alternatively, the promise may include an escape clause, i.e. a condition defining the state of the economy under which the central bank would not keep such a low rate and, instead, it would revert to setting policy under discretion. The escape clause can be expressed as a threshold in terms of a specific variable. The present paper shows that, when such a threshold is expressed in terms of an endogenous variable (e.g. output, inflation), there are cases where it becomes impossible for the central bank to act in a way that is consistent with its promise. Consistency imposes limits on the policy rate that can be set since reverting immediately to the optimal discretionary rate can be incompatible with exceeding the threshold.  相似文献   
8.
Decisions in Economics and Finance - This paper sets out to explore the nexus between cryptocurrencies connected to cannabis production and the three highest capitalization digital currencies....  相似文献   
9.
Review of Accounting Studies - Abstract We examine whether broad-based public engagement by institutional investors influences the behavior of portfolio firms. We investigate this question in the...  相似文献   
10.
Prior literature examined reciprocity in the context of value creation. However, research has yet to examine whether reciprocity exists in value sharing. To address this gap, the authors examine retailer’s reciprocal value sharing with its manufacturer in relation to new product introductions. The authors test, via a survey of retail managers, whether reciprocal value sharing is influenced by an interaction of manufacturer’s prior new product success with innovativeness of a manufacturer’s products and the frequency of new product introduction. The results indicate that a retailer’s reciprocal value sharing is greater when the manufacturer historically launched successful new products, and that this effect is decreased with the innovativeness of a manufacturer’s products but increased with the frequency of new product introduction.  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