全文获取类型
收费全文 | 18129篇 |
免费 | 602篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 3467篇 |
工业经济 | 1257篇 |
计划管理 | 3104篇 |
经济学 | 4173篇 |
综合类 | 213篇 |
运输经济 | 172篇 |
旅游经济 | 302篇 |
贸易经济 | 3062篇 |
农业经济 | 748篇 |
经济概况 | 2217篇 |
信息产业经济 | 2篇 |
邮电经济 | 15篇 |
出版年
2023年 | 120篇 |
2022年 | 101篇 |
2021年 | 154篇 |
2020年 | 330篇 |
2019年 | 430篇 |
2018年 | 591篇 |
2017年 | 609篇 |
2016年 | 546篇 |
2015年 | 326篇 |
2014年 | 503篇 |
2013年 | 2284篇 |
2012年 | 564篇 |
2011年 | 611篇 |
2010年 | 600篇 |
2009年 | 591篇 |
2008年 | 558篇 |
2007年 | 477篇 |
2006年 | 442篇 |
2005年 | 375篇 |
2004年 | 344篇 |
2003年 | 359篇 |
2002年 | 344篇 |
2001年 | 334篇 |
2000年 | 335篇 |
1999年 | 332篇 |
1998年 | 331篇 |
1997年 | 303篇 |
1996年 | 249篇 |
1995年 | 239篇 |
1994年 | 261篇 |
1993年 | 260篇 |
1992年 | 279篇 |
1991年 | 269篇 |
1990年 | 210篇 |
1989年 | 193篇 |
1988年 | 172篇 |
1987年 | 176篇 |
1986年 | 178篇 |
1985年 | 251篇 |
1984年 | 267篇 |
1983年 | 255篇 |
1982年 | 224篇 |
1981年 | 204篇 |
1980年 | 179篇 |
1979年 | 182篇 |
1978年 | 166篇 |
1977年 | 147篇 |
1976年 | 126篇 |
1975年 | 143篇 |
1973年 | 107篇 |
排序方式: 共有10000条查询结果,搜索用时 343 毫秒
61.
Summary Economic design of one-sided screening procedures for improving outgoing product quality based on a screening variable is
considered for the case with all parameters unknown. It is assumed that the performance and screening variables are jointly
normally distributed and that costs are incurred by screening inspection, acceptance of an imperfect item, and disposition
of a rejected one. A method for finding optimal cutoff value based on the predictive distribution is presented. 相似文献
62.
A conceptual framework of anonymity in Group Support Systems 总被引:2,自引:2,他引:0
Joseph S. Valacich Leonard M. Jessup Alan R. Dennis J. F. Nunamaker Jr. 《Group Decision and Negotiation》1992,1(3):219-241
As the development and use of automated systems for collaborative work grows, the need for a better understanding of these systems becomes more important. Our focus is on one type of system, a Group Support System (GSS) and, in particular, on one important aspect of a GSS—anonymity. A conceptual framework for the study of anonymity in a GSS is presented, which describes the general classes of variables and their relationships. These variables include the factors that influence anonymity in a GSS, types of anonymity, and the effects of anonymity on a message sender, receiver, group process, and outcome. Each of these variables is discussed with working propositions presented for important group process and outcome measures. The objectives of this article are to highlight the importance and complexity of anonymity, to act as a guide for empirical investigations of anonymity, and to influence future GSS development and use. 相似文献
63.
64.
Rudy K. Moenaert William E. Souder Arnoud De Meyer Dirk Deschoolmeester 《Journal of Product Innovation Management》1994,11(1):31-45
Rudy Moenaert, William Souder, Arnoud De Meyer, and Dirk Deschoolmeester report the results of their study of forty technologically innovative Belgian companies to examine the interaction between marketing and R&D. They studied one commercially successful and one commercially unsuccessful technological product innovation project in each participating company and collected data from one marketing and one R&D respondent per project. Communication flows between marketing and R&D are increased under conditions involving formalization of projects, decentralization, positive interfunctional climate, and role flexibility. 相似文献
65.
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
66.
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
67.
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
68.
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
69.
We consider an environment where two education institutions compete by selecting the proportion of their funding devoted to teaching and research and the criteria for admission for their students, and where students choose whether and where to attend university. We study the relationship between the cost incurred by students for attending a university located away from their home town and the equilibrium configuration that emerges in the game played by the universities. Symmetric equilibria, where universities choose the same admission standard, only exist when the mobility cost is high; when the mobility cost is very low, there is no pure strategy equilibrium. For intermediate values of the mobility cost, only asymmetric equilibria may exist; the final section of the paper provides an example where asymmetric equilibria do indeed exist for a plausible and robust set of parameters. 相似文献
70.