全文获取类型
收费全文 | 57篇 |
免费 | 0篇 |
专业分类
财政金融 | 12篇 |
工业经济 | 3篇 |
计划管理 | 4篇 |
经济学 | 7篇 |
综合类 | 2篇 |
运输经济 | 1篇 |
旅游经济 | 2篇 |
贸易经济 | 13篇 |
农业经济 | 2篇 |
经济概况 | 11篇 |
出版年
2023年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2017年 | 2篇 |
2016年 | 1篇 |
2015年 | 1篇 |
2013年 | 6篇 |
2012年 | 4篇 |
2011年 | 2篇 |
2010年 | 2篇 |
2009年 | 4篇 |
2008年 | 4篇 |
2007年 | 4篇 |
2005年 | 1篇 |
2002年 | 1篇 |
2000年 | 1篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1985年 | 1篇 |
1983年 | 4篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 1篇 |
排序方式: 共有57条查询结果,搜索用时 15 毫秒
41.
介绍了印度甘蔗主要病虫草害的发生和为害情况以及防治的具体措施,分析总结了印度甘蔗病虫草害的综合防控技术,如重视选育并推广甘蔗良种和高抗病虫品种,实行严格的种苗检疫制度和多样的种苗处理方法等措施.通过比对我国甘蔗病虫草害的防治现状,阐述了印度甘蔗防治技术的研究与应用对我国甘蔗产业的发展具有不可低估的参考和借鉴价值,其成功做法对我国糖业的可持续发展有启示作用.最后,对我国甘蔗产业植保技术的未来发展方向提出了4点建议,具体是:大力培育甘蔗良种和抗病虫品种;加速推广健康脱毒种苗;建立完善的甘蔗有害生物预警监测系统,推广实施生物防治;加大资金投入,加强技术培训. 相似文献
42.
While the issue of youth unemployment has received a great deal of attention by policy makers, there has been little empirical research on factors which affect the demand for young workers at the micro level of actual labour market settings. This paper offers some evidence on entry level wages, unskilled job characteristics, and recruitment practices as factors affecting the employment of urban youth. A bivariate discriminant analysis is applied to survey data on employers located in five, centralized urban labour markets and shown that firm size, turnover, number of unskilled job slots, school referrals and employee–friend referrals are significant, differentiating factors between firms who have young workers on their payroll and firms who do not employ youth. These differentiating factors are related to the structure of youth labour markets. 相似文献
43.
目的了解1995~2012年某低流行地区艾滋病疫情流行特征,为今后当地预防控制艾滋病提供科学依据。方法根据中国疾病预防控制信息系统中的艾滋病综合防治信息的上报数据,对1995~2012年报告的艾滋病病毒感染者/艾滋病病人( HIV/AIDS)的资料进行流行病学分析。结果1995~2012年累计报告HIV/AIDS104例,其中男性83例,女性21例,男性明显高于女性;职业分布以农民和工人为主,占78.7%;高发年龄为20~49年龄组,占86.5%。感染者文化程度以初中及以下为主,占62.5%;传播途径以性传播为主,占80.9%;自2007年以来,报告病例数逐渐增多。结论该地区疫情仍处于低流行地区,2007年以来,感染人数逐年增多,感染人数主要集中在文化程度低的男性青壮年农民(农民工),性途径是最主要的传播途径,男男性行为传播上升明显。 相似文献
44.
In our paper, we will present a general model that demonstrate that a price floor or a price ceiling, although not effective at the existing market price, nevertheless alters the competitive equilibrium and leads to erroneous policy conclusions. 相似文献
45.
This paper tests the hypothesis that the expected return premium on the market portfolio is always non-negative. A violation of this lower bound restriction provides evidence against a broad class of risk-based equilibrium models in favor of bubble behavior. Our tests utilize information variables, identified in prior literature, that predict time variation in market return premia. We employ out-of-sample forecasts and bootstraps generated with parameters that are consistent with non-negativity but closest to the estimated parameters. We find statistically reliable evidence against non-negativity for the excess return on the value-weighted market index. The most negative out-of-sample prediction was −2.01% in September 1973. 相似文献
46.
Gopalakrishnan Sharathchandra Rex Thompson 《Review of Quantitative Finance and Accounting》1994,4(2):137-153
We reconsider how the temporal resolution of uncertainty about the future payoffs from capital assets affects the initial valuation of these assets. Our results regarding valuation indicate that, in an intertemporal CAPM framework, the early resolution of market uncertainty leads to an increase in the value of the market portfolio. The values of individual assets change in direct proportion to their betas. We reconcile the differing conclusions of Ross (1989) and Epstein and Turnbull (1980) regarding the early resolution of what they term idiosyncratic and asset specific information respectively. 相似文献
47.
China's B-share market, which used to be restricted to foreign investors, was partially opened up in February 2001 to Chinese local investors. We take this as a controlled experiment in cross-border trading on a small scale. We find mild but positive effects on the B-share market, with higher volumes, lower levels of volatility, lower bid–ask spreads and more liquidity after liberalization. Between A- and B-shares, price disparities narrowed; the correlation and the co-integration relationships became stronger; and the flow of information became more balanced. More new individual investors entered into the B-share market without crowding out existing institutional investors. Even though the liberalization measure is partial and one-way, it has helped to improve the quality of the B-share market, and our results lend no support to the popular claim that liberalization does nothing but help the existing foreign shareholders to cash out. 相似文献
48.
Using a large-scale AT&T database, we decompose usage levels into frequency and duration, and then investigate how they affect survey response accuracy. Results show that more accurate surveys are obtained from those in the high frequency group (possibly because of the increased use of the more accurate rate-based method of recall and higher degrees of regularity), and from those in the longer duration group (possibly because of increased involvement). We therefore suggest that the survey method is less suited for light users because of higher error, and that alternative methods such as diaries might be more appropriate. We also found similarly consistent results with respect to self-perception of usage rate and the accuracy of survey recall. 相似文献
49.
50.
Using survey data, this paper examines the different goals and constraints facing corporate and association meeting planners (AMPs). It next shows how these differences produce 11 different concerns and behaviours. For instance, increased pressure for ethical behaviour and financial transparency has forced corporate meeting planners to focus attention on reducing meeting costs and to choose easily accessible and convenient properties for meetings. On the other hand, associations focus on the interests of their members and strive to comport with group norms, and therefore plan enjoyable family‐friendly meetings, often at relaxed and upscale locations. This paper outlines seven different ways in which the hospitality industry should approach corporate and AMPs. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献