全文获取类型
收费全文 | 15075篇 |
免费 | 447篇 |
专业分类
财政金融 | 2524篇 |
工业经济 | 1015篇 |
计划管理 | 2602篇 |
经济学 | 3756篇 |
综合类 | 169篇 |
运输经济 | 160篇 |
旅游经济 | 211篇 |
贸易经济 | 2560篇 |
农业经济 | 625篇 |
经济概况 | 1833篇 |
邮电经济 | 67篇 |
出版年
2023年 | 130篇 |
2021年 | 140篇 |
2020年 | 252篇 |
2019年 | 324篇 |
2018年 | 467篇 |
2017年 | 580篇 |
2016年 | 514篇 |
2015年 | 290篇 |
2014年 | 435篇 |
2013年 | 1756篇 |
2012年 | 513篇 |
2011年 | 517篇 |
2010年 | 469篇 |
2009年 | 544篇 |
2008年 | 416篇 |
2007年 | 361篇 |
2006年 | 308篇 |
2005年 | 328篇 |
2004年 | 257篇 |
2003年 | 305篇 |
2002年 | 253篇 |
2001年 | 251篇 |
2000年 | 259篇 |
1999年 | 247篇 |
1998年 | 227篇 |
1997年 | 231篇 |
1996年 | 213篇 |
1995年 | 176篇 |
1994年 | 182篇 |
1993年 | 202篇 |
1992年 | 212篇 |
1991年 | 201篇 |
1990年 | 201篇 |
1989年 | 180篇 |
1988年 | 167篇 |
1987年 | 162篇 |
1986年 | 177篇 |
1985年 | 218篇 |
1984年 | 205篇 |
1983年 | 187篇 |
1982年 | 181篇 |
1981年 | 189篇 |
1980年 | 170篇 |
1979年 | 188篇 |
1978年 | 150篇 |
1977年 | 139篇 |
1976年 | 130篇 |
1975年 | 95篇 |
1974年 | 103篇 |
1973年 | 102篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
This study compares the patterns of entry, survival and growth of domestic and foreign owned firms. We show that the post-entry behavior of foreign owned firms is quite different from that of their domestic counterparts. Among foreign entrants, we were able to distinguish between those which proceed by creating a new firm and those that acquire an already existing business. Our evidence reveals that the choice of the mode of entry in foreign markets exerts an impact upon the performance of firms that persists long after the moment of entry. As a consequence, our work clearly indicates that there is much to be gained in the understanding ofthe process of entry in foreign markets by studying the behavior of entrants over their first years in these markets. 相似文献
52.
The purpose of this research was to investigate the effects that user task load level has on the relationship between an individual's trust in and subsequent use of a system's automation. Military decision-makers trust and use information system automation to make many tactical judgments and decisions. In situations of information uncertainty (information warfare environments), decision-makers must remain aware of information reliability issues and temperate their use of system automation if necessary. An individual's task load may have an effect on his use of a system's automation in environments of information uncertainty.It was hypothesized that user task load will have a moderating effect on the positive relationship between system automation trust and use of system automation. Specifically, in situations of information uncertainty (low trust), high task load will have a negative effect on the relationship. To test this hypothesis, an experiment in a simulated command and control micro-world was conducted in which system automation trust and individual task load were manipulated. The findings from the experiment support the positive relationship between automation trust and automation use found in previous research and suggest that task load does have a negative effect on the positive relationship between automation trust and automation use. Experiment participant who incurred a higher task load exhibited an over-reliance on their automated information systems to assist them in their decision-making activities. Such an over-reliance can lead to vulnerabilities of deception and suggests the need for automated deception detection capabilities. 相似文献
53.
54.
This paper addresses the supply-side explanations of a logger shortage by estimating an occupational choice model that considers the role of earnings, nonpecuniary determinants and intergenerational factors. Our results showed that: (1) relative earnings have no statistically significant effect on career choice; (2) improvement in the public image of loggers substantially increases entry into logging; and (3) a strong intergenerational supply linkage exists but is currently being eroded. 相似文献
55.
Anna Ławrynowicz 《International Journal of Intelligent Systems in Accounting, Finance & Management》2006,14(1-2):59-76
A new approach to solving production management problems in the supply net is proposed. An expert system designed to help companies in medium-term and short-term production planning is discussed. The proposed expert system considers alternative process plans for a job and outsourcing, when a bottleneck exists in the machine. The proposed hybrid system uses the output of the expert system as the input of the genetic algorithm. The output of the genetic algorithm is a near optimal schedule. The proposed method does not require any unrealistic assumptions. It can be used to solve highly complicated and non-linear functions of a realistic problem. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
56.
An aggregate analysis of supply response in the paddy (rice) sector of Sri Lanka during 1952-87 is conducted to identify the impact of pricing policy, irrigation programmes, institutional credit and concessional sales on area, yield and overall supply. The focus of the estimation procedure is the selection of an appropriate functional form for regressions and on the price variable that best represents the price to which producers respond in making area and yield decisions. In the case of both area and yield, the econometric criteria favour the acceptance of log-linear equations with the ratio of the guaranteed price of paddy to fertiliser price. On the basis of overall supply elasticity estimates, it is concluded that while pricing policy, irrigation programmes and institutional credit provide incentives to the expansion of paddy production, concessional sales of rice act as a disincentive. 相似文献
57.
R. P. Byron 《Journal of Applied Econometrics》1992,7(3):309-322
The time-series distributed lag techniques of econometrics can be usefully applied to cross-sectional, spatial and cross-section time-series situations. The application is perfectly natural in cross-section, time-series models when regression coefficients evolve systematically as the cross-section grouping variable changes. The evolution of such coefficients lends itself to polynomial approximation or more general smoothing restrictions. These ideas are not new, Gersovitz and McKinnon (1978) and Trivedi and Lee (1981) providing two of the earliest applications of cross-equation smoothing techniques. However, their applications were in the context of coefficient variation due to seasonal changes and this may account for the non-diffusion of these techniques. The approach here is illustrated in the context of age-specific household formation equations based on census data, using Almon polynomials when the regression coefficients vary systematically by age group. A second application is provided, using spatial data, explaining the incidence of crime, by region; using polynomial and geometric smoothing to model distance declining regional effects. 相似文献
58.
59.
Sufficient conditions are found for designs, derived from completely symmetric designs by deleting binary blocks, to be E-optimal. Sufficient conditions are also found for E-optimality of designs obtained from other E-optimal designs by deleting all blocks forming a balanced incomplete block design on a subset of the treatments. The results include many binary and non-binary designs for which E-optimality was previously unknown. 相似文献
60.
The effectiveness of the decision‐making process in appraisal has been of long‐standing interest. This paper reports the results of research exploring the extent to which those undertaking appraisals apply systematic processes to their decision‐making, represented in terms of the cognitive processing models applied by appraisers. Results of 22 cognitive mapping interviews exploring appraisal practice, undertaken with appraisers in the Malaysian education system, are described. The resultant cognitive maps have been explored for what they tell us about the cognitive processing models underlying appraisers' decision‐making. Results suggest that the practice of appraisal evidenced in interviews demonstrates the presence of cognitive processing that reflects theoretical cognitive processing models, although some differences are observed between less experienced and experienced appraisers' models. Implications from the interview findings for the practice of appraisal are identified. 相似文献