全文获取类型
收费全文 | 11351篇 |
免费 | 321篇 |
专业分类
财政金融 | 2331篇 |
工业经济 | 839篇 |
计划管理 | 1848篇 |
经济学 | 2501篇 |
综合类 | 141篇 |
运输经济 | 91篇 |
旅游经济 | 245篇 |
贸易经济 | 1834篇 |
农业经济 | 468篇 |
经济概况 | 1350篇 |
信息产业经济 | 1篇 |
邮电经济 | 23篇 |
出版年
2021年 | 82篇 |
2020年 | 137篇 |
2019年 | 211篇 |
2018年 | 266篇 |
2017年 | 302篇 |
2016年 | 255篇 |
2015年 | 179篇 |
2014年 | 283篇 |
2013年 | 1293篇 |
2012年 | 348篇 |
2011年 | 393篇 |
2010年 | 337篇 |
2009年 | 383篇 |
2008年 | 346篇 |
2007年 | 275篇 |
2006年 | 274篇 |
2005年 | 243篇 |
2004年 | 228篇 |
2003年 | 235篇 |
2002年 | 240篇 |
2001年 | 208篇 |
2000年 | 196篇 |
1999年 | 183篇 |
1998年 | 209篇 |
1997年 | 208篇 |
1996年 | 188篇 |
1995年 | 145篇 |
1994年 | 154篇 |
1993年 | 172篇 |
1992年 | 185篇 |
1991年 | 176篇 |
1990年 | 131篇 |
1989年 | 129篇 |
1988年 | 111篇 |
1987年 | 121篇 |
1986年 | 131篇 |
1985年 | 181篇 |
1984年 | 150篇 |
1983年 | 180篇 |
1982年 | 146篇 |
1981年 | 141篇 |
1980年 | 155篇 |
1979年 | 145篇 |
1978年 | 106篇 |
1977年 | 128篇 |
1976年 | 113篇 |
1975年 | 111篇 |
1974年 | 96篇 |
1973年 | 76篇 |
1971年 | 67篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
Keith H. Coble Thomas O. Knight George F. Patrick & Alan E. Baquet 《Review of Agricultural Economics》2002,24(2):309-321
A survey conducted in Mississippi, Texas, Indiana, and Nebraska elicited producers' preferences for various farm policy changes. This permitted examination of the diversity of preferences that single-state studies have not allowed. Five policy choices, including deficiency payments, loan programs, crop insurance, export programs, and disaster payments were examined. Logit model results predicting producer preferences for each of the five dichotomous policy choices are reported. Explanatory variables based on expected utility theory such as risk aversion, price and yield variability, and price–yield correlation are significant in various models. 相似文献
23.
We provide a framework in which we link the valuation and assetallocation policies of defined benefits plans with the lifetimemarginal productivity schedule of the worker and the pensionplan formula. In turn, we examine the retirement policies thatare implied by the primitives of the model and the value ofpension obligations. Our model provides an explicit valuationformula for a stylized defined benefits plan. The optimal assetallocation policies consist of the replicating portfolio independentof the pension liabilities. We show that the worker with retirewhen the ratio of pension benefits to current wages reachesa critical value which depends on the parameters of the pensionplan and the discount rate. Using numerical techniques we analyzethe feedback effect of retirement policies on the valuationof plans and on the asset allocation decisions. 相似文献
24.
The economics of land transfer and title insurance 总被引:3,自引:0,他引:3
In the presence of uncertainty over the title of land (due to fraud or error), a legal system can protect either the current (innocent) owner, or a previous owner who claims title. The predominant system in the United States generally awards title to the latter in the event of legitimate claim. Thus, current owners frequently purchase title insurance to provide indemnification in the event of a loss. In contrast, the Torrens system awards title to the current owner, but provides for indemnification of any legitimate claimants. We evaluate these two systems and argue that if transaction costs are low, both promote efficient assignment of title (according to the Coase Theorem), but if transaction costs are high, the Torrens system is more likely to award title to the party that values it the most (namely, the current possessor). 相似文献
25.
Extensification of agriculture is one of the major factors contributing to the destruction of forests in Africa. In Sudan, such horizontal expansion comes at the expense of land devoted to trees and other vegetation, thereby inducing conditions that are inimical to sustainable agricultural production. Different factors have contributed to extensification. Although high economic returns from crop (mainly sorghum) production was an important factor encouraging extensification of rainfed mechanized farming, other factors outside agriculture have also contributed to that expansion. This paper uses data from eastern Sudan and an acreage response model, to identify the most important factors influencing acreage expansion. Different measures and forms of risk were used in the acreage response model. The paper shows how policies in the energy sector can indirectly influence acreage expansion in the agricultural sector. 相似文献
26.
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
27.
28.
Daniel R. Denison Jane E. Dutton Joel A. Kahn Stuart L. Hart 《Journal of Management Studies》1996,33(4):453-474
This paper explores the relationship between organizational context and the interpretation of strategic issues by examining the hypothesis that CEOs' interpretations of foreign investment in the USA are influenced by the organizational context in which they are embedded. Three aspects of organizational context - the global business experience of the firm; the firm's level of organizational inertia (as represented by firm age and size); and the resources available for responding - are examined as predictors of CEOs' perceptions of foreign investment as a threat or an opportunity. Analysis of data from 320 organizations, controlled by industry, shows that global business experience, firm size, and perceived capability are significant predictors of the perception of threat and opportunity. the discussion addresses the implications of these findings for future research on issue interpretation and organizational context. 相似文献
29.
In this paper we offer a method for deciding how to aggregate a set of elementary industries. The method is then applied to the problem of estimating a wage equation that allows for industry-specific effects. Our method explicitly formalizes the trade-off between goodness-of-fit and parsimony implicit in an aggregation problem. By varying the parameter of the assumed loss function, one obtains a whole sequence of aggregation levels. Further, the resulting sequence is consistent; that is, groupings formed at one level of aggregation will never be undone when one aggregates further. 相似文献
30.
We examine the role of index futures trading in spot market volatility. We use the exponential generalized autoregressive conditional heteroskedasticity (EGARCH) approach to measure volatility, analyze causality and feedback relations between volatilities in the spot and futures markets, and test various hypotheses in the context of a multivariate model that incorporates other macrostate variables. Our empirical results suggest index futures trading may not be blamed for the observed volatility in the spot market. Rather, we find stronger and more consistent support for the alternative posture that volatility in the futures market is an outgrowth of a turbulent cash market. We use the regret (cognitive dissonance) theory to explain our results. 相似文献