全文获取类型
收费全文 | 35960篇 |
免费 | 516篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 6668篇 |
工业经济 | 2250篇 |
计划管理 | 5689篇 |
经济学 | 7856篇 |
综合类 | 673篇 |
运输经济 | 144篇 |
旅游经济 | 300篇 |
贸易经济 | 7575篇 |
农业经济 | 908篇 |
经济概况 | 3785篇 |
信息产业经济 | 46篇 |
邮电经济 | 583篇 |
出版年
2021年 | 111篇 |
2020年 | 257篇 |
2019年 | 338篇 |
2018年 | 2724篇 |
2017年 | 2489篇 |
2016年 | 1656篇 |
2015年 | 351篇 |
2014年 | 538篇 |
2013年 | 2258篇 |
2012年 | 967篇 |
2011年 | 2573篇 |
2010年 | 2331篇 |
2009年 | 2084篇 |
2008年 | 2048篇 |
2007年 | 2341篇 |
2006年 | 554篇 |
2005年 | 769篇 |
2004年 | 875篇 |
2003年 | 996篇 |
2002年 | 688篇 |
2001年 | 466篇 |
2000年 | 454篇 |
1999年 | 415篇 |
1998年 | 413篇 |
1997年 | 362篇 |
1996年 | 326篇 |
1995年 | 307篇 |
1994年 | 313篇 |
1993年 | 321篇 |
1992年 | 334篇 |
1991年 | 318篇 |
1990年 | 268篇 |
1989年 | 245篇 |
1988年 | 230篇 |
1987年 | 223篇 |
1986年 | 253篇 |
1985年 | 331篇 |
1984年 | 340篇 |
1983年 | 330篇 |
1982年 | 281篇 |
1981年 | 264篇 |
1980年 | 243篇 |
1979年 | 224篇 |
1978年 | 224篇 |
1977年 | 213篇 |
1976年 | 167篇 |
1975年 | 186篇 |
1974年 | 151篇 |
1973年 | 135篇 |
1972年 | 101篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
122.
Suppose an investor has a fixed decision horizon and an appropriate utility function for measuring his or her utility of wealth. If there are only two investment vehicles, a risky and a risk-free asset, then the optimal investment strategy is such that, at any time, the amount invested in the risky asset must be the product of his or her “current risk tolerance” and the risk premium on the risky asset, divided by the square of the diffusion coefficient of the risky asset. In the case of more than one risky asset, the optimal investment strategy is similar, with the ratios of the amounts invested in the different risky assets being constant over time. 相似文献
123.
Gillian S. Morris 《Journal of Consumer Policy》1994,17(2):147-158
This paper discusses the revolutionary new right introduced by the Trade Union Reform and Employment Rights Act 1993 for consumers to seek a court order to halt unlawful industrial action which disrupts the supply of goods or services, regardless of whether they have any enforceable right to the goods or services in question. Even more unusually, public funding is available to conduct these proceedings irrespective of the applicant's means where the industrial action is organised by a trade union. The paper analyses the nature of the right, locates it within the broader framework of remedies for the non-provision or inadequate provision of goods or services, and assesses the wider implications of the right for consumer policy. 相似文献
124.
Empirical studies provide compelling evidence that economic agents do not adopt the complete range of energy-efficient technologies that are cost-effective under prevailing prices and market conditions. Analysts commonly attribute this anomaly to the use of high discount rates in energy-related decisions-an interpretation that is difficult to reconcile with standard models of rational choice. This paper recasts the controversy from the perspective of economic theory and finds that market failures related to asymmetric information, bounded rationality, and transaction costs are major contributors to the so-called "efficiency gap." 相似文献
125.
Lucile S. Keyes 《Review of Industrial Organization》1995,10(2):143-159
The 1992 Horizontal Merger Guidelines of the Department of Justice and the Federal Trade Commission outline an enforcement policy which makes a long overdue break with its predecessors in awarding no decisive or predominant role to market concentration as a criterion of anticompetitive effect. However, the new policy does not provide an adequate substitute criterion: the tests that it prescribes for screening merger proposals are so specified that a potentially large proportion of anticompetitive mergers can escape challenge without showing any promise of improving efficiency. The time is ripe for a comprehensive inquiry aimed at formulating a more satisfactory policy. 相似文献
126.
Our examination of the cross-section of expected returns reveals economically and statistically significant compensation (about 6 to 9 percent per annum) for beta risk when betas are estimated from time-series regressions of annual portfolio returns on the annual return on the equally weighted market index. The relation between book-to-market equity and returns is weaker and less consistent than that in Fama and French (1992). We conjecture that past book-to-market results using COMPUS-TAT data are affected by a selection bias and provide indirect evidence. 相似文献
127.
Gabrielle Demange 《Economic Theory》2002,20(1):1-27
Summary. This paper defines and studies optimality in a dynamic stochastic economy with finitely lived agents, and investigates the
optimality properties of an equilibrium with or without sequentially complete markets. Various Pareto optimality concepts
are considered, including interim and ex ante optimality. We show that, at an equilibrium with a productive asset (land) and sequentially complete markets, the intervention
of a government may be justified, but only to improve risk sharing between generations. If markets are incomplete, constrained
interim optimality is investigated in two-period lived OLG economies. We extend the optimality properties of an equilibrium with
land and give conditions under which introducing a pay-as-you-go system at an equilibrium would not lead to any Pareto improvement.
Received: October 5, 1998; revised version: April 3, 2001 相似文献
128.
Richard R. Mendenhall 《Journal of Accounting Research》2002,40(3):841-863
Recent studies suggest the apparent delay in the stock-price response to earnings announcements (i.e., post-earnings announcement drift) is caused by investors who underestimate the autocorrelation of seasonally-differenced earnings (persistence). I present results that suggest: (1) a firm's future persistence is predictable on the basis of its past persistence; (2) the immediate stock-price response to earnings is positively related to historical persistence; (3) post-earnings-announcement drift is independent of historical persistence; and (4) consistent with (2) and (3), the difference between a firm's current observed persistence and that implied in stock prices is independent of its historical persistence. These results extend prior research by demonstrating that investors are aware not only that seasonally-differenced earnings are autocorrelated, but that investors recognize firm-specific differences in the magnitude of the autocorrelation. 相似文献
129.
130.