全文获取类型
收费全文 | 15391篇 |
免费 | 397篇 |
专业分类
财政金融 | 2944篇 |
工业经济 | 1307篇 |
计划管理 | 2580篇 |
经济学 | 3277篇 |
综合类 | 164篇 |
运输经济 | 121篇 |
旅游经济 | 272篇 |
贸易经济 | 2307篇 |
农业经济 | 720篇 |
经济概况 | 2092篇 |
信息产业经济 | 1篇 |
邮电经济 | 3篇 |
出版年
2021年 | 105篇 |
2020年 | 172篇 |
2019年 | 227篇 |
2018年 | 330篇 |
2017年 | 312篇 |
2016年 | 294篇 |
2015年 | 201篇 |
2014年 | 338篇 |
2013年 | 1620篇 |
2012年 | 452篇 |
2011年 | 462篇 |
2010年 | 443篇 |
2009年 | 515篇 |
2008年 | 443篇 |
2007年 | 377篇 |
2006年 | 355篇 |
2005年 | 295篇 |
2004年 | 307篇 |
2003年 | 304篇 |
2002年 | 292篇 |
2001年 | 293篇 |
2000年 | 334篇 |
1999年 | 289篇 |
1998年 | 266篇 |
1997年 | 279篇 |
1996年 | 255篇 |
1995年 | 236篇 |
1994年 | 232篇 |
1993年 | 272篇 |
1992年 | 246篇 |
1991年 | 253篇 |
1990年 | 238篇 |
1989年 | 220篇 |
1988年 | 210篇 |
1987年 | 187篇 |
1986年 | 216篇 |
1985年 | 293篇 |
1984年 | 269篇 |
1983年 | 270篇 |
1982年 | 225篇 |
1981年 | 225篇 |
1980年 | 241篇 |
1979年 | 201篇 |
1978年 | 172篇 |
1977年 | 166篇 |
1976年 | 144篇 |
1975年 | 133篇 |
1974年 | 112篇 |
1973年 | 111篇 |
1972年 | 84篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
142.
Returns generated with small firm mutual fund data are used to examine the extent to which identification of a small firm effect is due to the difficulty in measuring the direct and indirect transaction costs involved in investing in the common shares of small capitalization stocks. Little if any evidence of the excess risk-adjusted returns is obtained for either of the period 1978–1983, when the small firm effect was observed, or the period 1984–1989, when it was not. The small firm effect may therefore be attributed to (1) higher direct transaction costs including bid-ask spread and broker fees and (2) higher indirect transaction costs including portfolio management expenses and market impact costs.The authors thank an anonymous referee for helpful comments on an earlier version of this paper, and Brett Salazar for valuable assistance in data collection. Errors remain our own. 相似文献
143.
Many employers are extending workplace rights by allowing for more employee voice in decision making. Numerous unionized organizations have established formal worker participation processes to help achieve this end and to improve organizational performance. Based largely on theory, such processes are normally designed to operate independently from the bargaining process. The purpose of this study was to examine the relationship between participation and bargaining processes, and the effect of this relationship on workplace satisfaction. A total of 712 Midwest union officials were surveyed, and the results indicate that the processes tend to become integrated in the workplace. Further, union officials' workplace satisfaction was greater where formal worker participation is institutionalized within the bargaining process. 相似文献
144.
Preston C. Bottger Ingrid H. Hallein Philip W. Yetton 《Journal of Management Studies》1985,22(4):358-368
This study explores the effects of task structure and leader power on participative leadership across Australian, African, Papua-New Guinea and Pacific Island managers. Managers in all national groups are more participative in situations of low structure and low power than for high structure and high power, respectively. Participation in situations of low structure and low power declines in the order: Australia, Africa, Papua-New Guinea, Pacific Islands. It is argued that this effect is an instrumental effect of managerial education, rather than being culturally determined. the Vroom-Yetton leadership methodology is used to measure participation levels. Subjects are a total of 150 middle-level managers attending management education courses. 相似文献
145.
146.
Following Parsian and Farsipour (1999), we consider the problem of estimating the mean of the selected normal population, from two normal populations with unknown means and common known variance, under the LINEX loss function. Some admissibility results for a subclass of equivariant estimators are derived and a sufficient condition for the inadmissibility of an arbitrary equivariant estimator is provided. As a consequence, several of the estimators proposed by Parsian and Farsipour (1999) are shown to be inadmissible and better estimators are obtained.
Received January 2001/Revised May 2002 相似文献
147.
In this paper we present an effective algorithm for the construction and the identification of two-level nonisomorphic orthogonal
arrays. Using this algorithm, we identify and list a full catalogue of nonisomorphic orthogonal arrays with parameters OA(24,7,2,t), OA(28,6,2,t) and OA(32,6,2,t), t ≥ 2. Some statistical properties of these designs are also considered. 相似文献
148.
149.
This paper presents a new approximation to the exact sampling distribution of the instrumental variables estimator in simultaneous equations models. It differs from many of the approximations currently available, Edgeworth expansions for example, in that it is specifically designed to work well when the concentration parameter is small. The approximation is remarkable in that simultaneously: (i) it has an extremely simple final form; (ii) in situations for which it is designed it is typically much more accurate than is the large sample normal approximation; and (iii) it is able to capture most of those stylized facts that characterize lack of identification and weak instrument scenarios. The development leading to the approximation is also novel in that it introduces techniques of some independent interest not seen in this literature hitherto. 相似文献
150.
This paper is devoted to studying optimal designs for estimating an extremal point of a multivariate quadratic regression model in the unit hyperball. The problem of estimating an extremal point is reduced to that of estimating certain parameters of a corresponding nonlinear (in parameters) regression model. For this reduced problem truncated locally D-optimal designs are found in an explicit form. The result is a generalization of the results of Fedorov and Müller (1997) for onedimensional quadratic regression function in the unit segment.
Received February 2002 相似文献