Consistent estimation in the bilinear multivariate errors-in-variables model

A bilinear multivariate errors-in-variables model is considered. It corresponds to an overdetermined set of linear equations AXB=C, A∈ℝ^m×n, B∈ℝ^p×q, in which the data A, B, C are perturbed by errors. The total least squares estimator is inconsistent in this case.  An adjusted least squares estimator is constructed, which converges to the true value X, as m →∞, q →∞. A small sample modification of the estimator is presented, which is more stable for small m and q and is asymptotically equivalent to the adjusted least squares estimator. The theoretical results are confirmed by a simulation study. Acknowledgements. We thank two anonymous reviewers for their suggestions and corrections.? A. Kukush is supported by a postdoctoral research fellowship of the Belgian office for Scientific, Technical and Cultural Affairs, promoting Scientific and Technical Collaboration with Central and Eastern Europe.? S. Van Huffel is a full professor with the Katholieke Universiteit Leuven.? I. Markovsky is a research assistant with the Katholieke Universiteit Leuven.? This paper presents research results of the Belgian Programme on Interuniversity Poles of Attraction (IUAP V-22), initiated by the Belgian State, Prime Minister's Office – Federal Office for Scientific, Technical and Cultural Affairs of the Concerted Research Action (GOA) projects of the Flemish Government MEFISTO-666 (Mathematical Engineering for Information and Communication Systems Technology), of the IDO/99/03 project (K.U. Leuven) “Predictive computer models for medical classification problems using patient data and expert knowledge”, of the FWO projects G.0078.01, G.0200.00, and G0.0270.02.? The scientific responsibility is assumed by its authors.     

项目融资模块间关联研究及实证分析

本文从项目融资框架结构出发,对项目融资模块之间的相互联系及影响进行了系统分析。并以加拿大塞尔加纸浆项目为例,说明项目融资模块之间是如何相互影响和相互作用的。     

There's something about saving …

The paper considers how people should plan their saving, given certain assumptions about inheritance and changes in household circumstances. The results are produced by a model that takes into account tax and state benefits as well as various private savings vehicles. It concludes that, for many households, saving for retirement through a ‘pension’ might not be optimum and that the best strategy is to vary the incidence and allocation of saving in response to changes in household circumstances.     

失落的同志

中国一位副部长于2001年到格鲁吉亚访问,在与时任总统谢瓦尔德纳泽会见时,中方按照外交礼节,称呼总统为总统先生,这样称呼几次以后,老谢(中国人的圈子里这样称呼谢瓦尔德纳泽)半开玩笑半认真地建议:还是叫同志吧。于是中方改口叫“总统同志”。惹得大家笑起来。故事已经完结,但     

Satisfaction drivers for Internet service technology among stock brokerage customers in Thailand

Many financial services firms are offering the Internet as a self-service technology (SST), for online stock trading, in an effort to increase effciency and give customers greater access. It is important to understand how this technology will influence customer satisfaction. This paper reports results of exploratory research to identify sources of customer satisfaction and dissatisfaction with the service encounter in Thai stockbrokerage firms. Results show that customers and service providers determine sources of customer dis/satisfaction differently, depending on whether the service encounter is technology-based or interpersonal. Different customer profiles give rise to segmentation in response to the use of Internet technology in this industry.     

矿业城市的结构性危机与转型

矿业城市日益成为社会关注的重大问题 矿业城市是工业化和城市化的产物，是以矿产资源为对象的采掘工业及其相关的社会生产发展到一定规模后，由于人口聚集而形成的特定地域。我国矿业城市的起源有三种类型：基于传统手工业的历史矿业城市，如自贡与景德镇：近代工业化产生的矿业城市，如抚顺、阜新、徐州等；新中国建立以后以一厂一市模式建立的矿业城市，如大庆、攀枝花等。据统计，我国已崛起的矿业城镇已达426座，矿业城镇人口31084万人，这些城市已经构成了我国城镇体系的重要部分，同时也是我国城市经济乃至整个国民经济的重要组成部分。由于矿业城镇在我国点多面广，在地区发展中往往起若“增长极”的作用，因此，矿业城市的发展直接影响到我国整体经济社会发展的格局。     

从媒体的社会责任谈《广告法》修订

《广告法》自1995年2月正式实施以来，确实起到了积极作用。但是11年过去了，随着市场经济的高速发展和广告发布量的明显增多，《广告法》暴露出越来越多不够完善的地方。为什么有些凭经验就可以判定的违法、违规广告偏偏有合法的批文？为什么在电视上明令禁止的广告却可以在其他媒体刊登？除传统四大媒体以外的新兴媒体的广告发布是否也应该同样遵守《广告法》？个别广告主利用广告从事违法经营活动的行为日趋严重，虚假医疗、药品广告铺天盖地，媒体在观众中造成极坏的印象，为什么这些违法广告得以发布？仔细归纳一下，无非是广告主大打擦边球，钻《广告法》的空子；媒体的广告经营部门行走在创收压力与媒体社会责任失衡的空间。     

把握自主创新重视资源整合

在“十一五”规划的开局之年,中央确定了企业技术自主创新与市场化发展相结合的新战略。理解好这一强国方略,应当重视资源整合,克服在自主创新方面的单一化、自发式、弱质态、低投入问题,这需要把自主创新与科教兴国、人才强国战略有机联系起来。     

建立"MFA"人才培养机制加速培养高级金融管理人才

加速培养应用型高级金融管理人才是我们面临的迫切课题，但现有的人才培养方式并不利于高层次金融应用人才的诞生和成长，通过其建立一套完整的“MFA”人才培养机制和办法是实现我国金融高级管理人才培养的可持续发展之路。