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   20014篇
  免费   401篇
财政金融   3982篇
工业经济   1531篇
计划管理   3132篇
经济学   4363篇
综合类   231篇
运输经济   113篇
旅游经济   329篇
贸易经济   3380篇
农业经济   852篇
经济概况   2471篇
邮电经济   31篇
  2021年   138篇
  2020年   210篇
  2019年   315篇
  2018年   319篇
  2017年   351篇
  2016年   367篇
  2015年   288篇
  2014年   389篇
  2013年   1940篇
  2012年   574篇
  2011年   618篇
  2010年   542篇
  2009年   573篇
  2008年   610篇
  2007年   551篇
  2006年   529篇
  2005年   497篇
  2004年   422篇
  2003年   456篇
  2002年   435篇
  2001年   386篇
  2000年   398篇
  1999年   389篇
  1998年   387篇
  1997年   332篇
  1996年   339篇
  1995年   303篇
  1994年   302篇
  1993年   327篇
  1992年   298篇
  1991年   293篇
  1990年   252篇
  1989年   250篇
  1988年   226篇
  1987年   234篇
  1986年   228篇
  1985年   399篇
  1984年   370篇
  1983年   362篇
  1982年   294篇
  1981年   295篇
  1980年   294篇
  1979年   289篇
  1978年   247篇
  1977年   280篇
  1976年   230篇
  1975年   199篇
  1974年   171篇
  1973年   183篇
  1970年   122篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
A circular metropolitan area consists of a central city surrounded by a suburb. Households sort over the two jurisdictions based on public service levels and their costs of commuting to the metropolitan center. Using numerical simulations, we show that (1) there typically exist two equilibria: one in which the poor form the voting majority in the central city and the other in which the rich form the majority in the central city; (2) there is an efficiency vs. equity trade-off as to which equilibrium is preferred; and (3) if the central city contains only poor households, equity favors expanding the central city to include rich households. The third result arises not because of a fiscal subsidy from rich to poor households induced by a property tax but rather because of a change in house price capitalization.  相似文献   
112.
Extant empirical research has reported nonlinear behavior within arbitrage relationships. In this article, the authors consider potential nonlinear dynamics within FTSE‐100 index and index‐futures. Such nonlinearity can be rationalized by the existence of transactions costs or through the interaction between informed and noise traders. They consider several empirical models designed to capture these alternative dynamics. Their empirical results provide evidence of a stationary basis term, and thus cointegration between index and index‐futures, and the presence of nonlinear dynamics within that relationship. The results further suggest that noise traders typically engage in momentum trading and are more prone to this behavior type when the underlying market is rising. Fundamental, or arbitrage, traders are characterized by heterogeneity, such that there is slow movement between regimes of behavior. In particular, fundamental traders act more quickly in response to small deviations from equilibrium, but are reluctant to act quickly in response to larger mispricings that are exposed to greater noise trader price risk. © 2006 Wiley Periodicals, Inc. Jrl Fut Mark 26:343–368, 2006  相似文献   
113.
2008年,亚太货币兑美元汇率可能进一步走高,连较小国家的货币也将给投资者带来希望。  相似文献   
114.
115.
Social capital is a person or group's sympathy for or sense of obligation to another person or group. This article introduces social capital into a neoclassical model of farmland exchange and shows how relationships alter the terms of trade. Empirical evidence from a survey of farmers shows that the type of relationship farmland sellers have with farmland buyers has a statistically significant and economically important effect on the minimum-sell price for farmland. Compared to the minimum-sell price when selling to a total stranger in an arm's-length transaction, farmland sellers discount prices to friendly neighbors and relatives and require a premium from unfriendly neighbors and influential people in the community.  相似文献   
116.
117.
H. Heyer 《Metrika》1994,41(1):28-28
Ohne Zusammenfassung  相似文献   
118.
In the 1980s a number of large corporations restructured their diversified businesses through divestitures. It is hypothesized that restructuring activity focused on firms at intermediate levels of diversification (e.g., related-linked) which have a mixture of related and unrelated business units. Results confirm this hypothesis which explains that such mixed corporate strategies create organizational and control inefficiencies in managing both related and unrelated types of business units. Restructured firms were also found to move towards two types of different internal capital markets (related and unrelated). Most restructuring firms moved toward lower levels of diversification (e.g., related-constrained), although some moved toward higher levels of diversification (e.g., unrelated business). Also, this study finds restructuring firms that changed their corporate strategy by reducing diversified scope increased their R&D intensity. Firms that restructured and increased their diversified scope decreased R&D intensity. This result suggested a partial substitution between diversification and R&D activity.  相似文献   
119.
The role of investment banks in acquisitions   总被引:3,自引:0,他引:3  
We compare acquisitions completed with and without investmentbank advice over the 1981 to 1982 period. We find that the choiceto use an investment bank depends on the complexity of the transaction,the type of transaction (takeovers versus acquisitions of assets),the acquiror's prior acquisition experience, and the degreeof diversification of the target firm. Although acquisitionannouncement returns are lower for firms using investment banks,this difference can be explained by differences in transactioncharacteristics. These results suggest that transaction costsare the main determinant of investment banking choice, followedby contracting costs and asymmetric information costs.  相似文献   
120.
Stop and Go Agricultural Policies with a Land Market   总被引:1,自引:0,他引:1  
This article studies the design of farm policy in the presence of asymmetric information about farmers' productivity, a government objective to insure farmers a minimum "parity" income, an endogenous land rent, and diminishing returns on alternative (nonprogram crop) land uses. In this setting, acreage set asides are never part of an optimal farm policy, although compensated acreage limits are. When there are new farmer entrants who cannot be excluded from farm programs, optimal policy takes the form of a pure voluntary acreage limitation—or "buyout"—program in which high-cost producers participate and low-cost producers do not.  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