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   1529篇
  免费   61篇
财政金融   324篇
工业经济   76篇
计划管理   291篇
经济学   371篇
综合类   14篇
运输经济   15篇
旅游经济   38篇
贸易经济   240篇
农业经济   97篇
经济概况   122篇
邮电经济   2篇
  2023年   8篇
  2021年   12篇
  2020年   28篇
  2019年   23篇
  2018年   25篇
  2017年   48篇
  2016年   51篇
  2015年   34篇
  2014年   40篇
  2013年   207篇
  2012年   59篇
  2011年   51篇
  2010年   47篇
  2009年   63篇
  2008年   61篇
  2007年   53篇
  2006年   52篇
  2005年   48篇
  2004年   43篇
  2003年   47篇
  2002年   53篇
  2001年   38篇
  2000年   25篇
  1999年   40篇
  1998年   34篇
  1997年   30篇
  1996年   28篇
  1995年   21篇
  1994年   19篇
  1993年   16篇
  1992年   16篇
  1991年   12篇
  1990年   13篇
  1989年   13篇
  1988年   16篇
  1987年   18篇
  1986年   10篇
  1985年   21篇
  1984年   18篇
  1983年   20篇
  1982年   17篇
  1981年   14篇
  1980年   11篇
  1979年   16篇
  1978年   14篇
  1977年   12篇
  1976年   9篇
  1975年   5篇
  1974年   8篇
  1967年   4篇
排序方式: 共有1590条查询结果,搜索用时 406 毫秒
111.
A total of 289 studies of returns to agricultural R&D were compiled and these provide 1821 estimates of rates of return. After removing statistical outliers and incomplete observations, across the remaining 1128 observations the estimated annual rates of return averaged 65 per cent overall — 80 per cent for research only, 80 per cent for extension only, and 47 per cent for research and extension combined. These averages reveal little meaningful information from a large body of literature, which provides rate-of-return estimates that are often not directly comparable. This study was aimed at trying to account for the differences. Several features of the methods used by research evaluators matter, in particular assumptions about lag lengths and the nature of the research-induced supply shift.  相似文献   
112.
Two features common to many auctions are the use of reserve prices and the existence of secondary markets for the goods being sold. Even in simple symmetric settings, the combination of these features can preclude existence of an equilibrium in symmetric separating bidding strategies. With a reserve price sufficiently far below the maximum (endogenous) valuation, a symmetric equilibrium still exists, but with some types pooling at the reserve. The optimal reserve price depends not only on the joint distribution of bidders' information before and after the auction, but also on how surplus is divided in the secondary market. Journal of Economic Literature Classification Numbers: D44, C7, L1, D82  相似文献   
113.
With implications for navigation, safety, entertainment and vehicle maintenance as well as regulation and infrastructure investment in roads, telematics has the potential to transform driving more than any other innovation for decades. In the already well-established Asian telematics industry, revenue tends to come from extra charges at the time of vehicle-sale, with most subsequent services provided free. The US model has evolved differently, with much of the cost of telematics hardware and software subsidized in the initial vehicle sale price and revenue coming from services used. The decision to invest in telematics is therefore riskier in the US. This article first briefly summarizes the potential of telematics. It then analyzes the investment risks, particularly for automakers. It concludes with recommendations on how the US auto industry can minimize risk and make the most of the opportunities.  相似文献   
114.
Employment and child-care choices in Canada and the United States   总被引:1,自引:0,他引:1  
In this paper we examine employment and child-care choices of two-parent families with young children in the United States and Canada, using a pooled data set based on recent national surveys in each country. We find that the employment and child-care choices of Canadian families are similar to those of U.S. families. Estimates of a model of employment and child-care choices indicate significant effects of child-care subsidies, child-care prices, and wage rates on employment and child-care choices. However, none of these factors helps to explain the differences in employment and child-care choices between the two countries.
Ce mémoire examine le choix de l'emploi et du soin des enfants dans les familles où il y deux parents aux Etats-Unis et au Canada en utilisant des données d'études récentes dans les deux pays. Il appert que les choix des familles canadiennes sont semblables à ceux des familles américaines. Les calibrations d'un modèle de ces choix montrent les effets significatifs des subventions au soin des enfants, du prix des soins des enfants, et des taux de salaires sur ces choix. Cependant, aucun de ces facteurs n'explique les diffrences dans les patterns de choix entre les deux pays.  相似文献   
115.
We analyze periodic and seasonal cointegration models for bivariate quarterly observed time series in an empirical forecasting study. We include both single equation and multiple equation methods for those two classes of models. A VAR model in first differences, with and without cointegration restrictions, and a VAR model in annual differences are also included in the analysis, where they serve as benchmark models. Our empirical results indicate that the VAR model in first differences without cointegration is best if one-step ahead forecasts are considered. For longer forecast horizons however, the VAR model in annual differences is better. When comparing periodic versus seasonal cointegration models, we find that the seasonal cointegration models tend to yield better forecasts. Finally, there is no clear indication that multiple equations methods improve on single equation methods.  相似文献   
116.
This paper provides an alternative insight into Japan's current economic problems. We concentrate upon the role played by the economy's central actors, namely Japan's transnational corporations. Since the early 1980's, Japan's transnationals have become dominant players in the global economy, and now have a higher rate of physical investment in new, overseas greenfield sites than their competitors. This has had detrimental consequences for Japan's domestic economy, particularly for small firms who operate in keiretsu networks. This has led to concerns about the 'hollowing out' of Japan's domestic industry raising the possibility of long-term industrial decline and 'strategic failure'.  相似文献   
117.
ABSTRACT If labor is fairly mobile, as it is in the United States, one would expect that households would move from less desirable areas toward more desirable areas until all areas are equally desirable. The way that areas become equally desirable is through the impact of movers on wages and rents (and possibly "endogenous" disamenities, such as congestion or pollution). That is, as people move to desirable areas, they will increase the demand for land (raising rents) and increase the supply of labor (lowering wages); in equilibrium, the wage and rent "compensation" for the niceness of an area reveals, in dollar terms, just how nice the area is. Blomquist, Berger, and Hoehn 1988 demonstrated the empirical importance of such amenity compensation in estimates of the "quality-of-life" in urban areas. However, those authors were unable to include fringe benefits, which are about 40 percent of explicit wage payments, in their wage compensation. This matters greatly as amenities are seen here to be even more important than previously thought and the regional implications are pronounced, with the West and Southeast looking "better" when fringe benefits are included and the East North Central and Northeast looking substantially "worse."  相似文献   
118.
119.
Integrating theories and findings from various disciplines, we develop a decision utility model to explain how anticipated discrete emotions mediate investment decisions. We illustrate the model with the anticipated discrete emotions of a hypothetical Ponzi scheme investor and suggest practical measures to manage financial risks, emotionally.  相似文献   
120.
The domain and theories of marketing have been expanding since the origins of the discipline. Since the 1970s marketing science has been organized around the exchange paradigm. Marketing concepts apply to all forms of exchange, whether it is goods, services, personages, places or ideas, and whether it is between individuals, for-profit and nonprofit firms, governments and NGOs. Marketing theories evolved from a firm oriented view to encompass the exchanging dyad. More recently the paradigm expanded to a network level of explanation, and relational theories have come to the fore. But even as the field struggles to grasp its new fields of explanation, there is a Kuhnian shift happening at its boundaries. The shift significantly bends the marketing worldview as well as the theoretical tools and methodologies we use to study it. In this paper we develop a three-tiered explanation of the emerging field of marketing—its subphenomena (consumer experiences and sensory systems), its phenomena (marketing networks), and its superphenomena (sustainability and development).  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