A LOWER BOUND FOR THE SINGLE-LEVEL DYNAMIC HORIZON LOT-SIZING PROBLEM

Conventional production planning methods assume the existence of a medium- or longrange demand horizon. However, demand usually is known over a much shorter range; scheduling decisions must be made within this “decision window,” which rolls forward in time. This paper presents a new lower bound for lot-sizing heuristics in a rolling-horizon framework and compares it to the well-known Wagner-Whitin bound. The new bound indicates heuristic schedules that have costs close to the optimum. Rolling-horizon schedule costs are compared to corresponding static-horizon schedule costs (assuming the whole horizon is known in advance), using the ratio of decision-window size to the natural order cycle as a parameter. For values below unity, the rolling-horizon policy is significantly more costly. For values above one, the two policies have similar costs and actually converge as the parameter value increases.     

Applications and Implementation A SEPARABLE PROGRAMMING APPROACH TO EXPECTED COVERAGE: AN APPLICATION TO AMBULANCE LOCATION

The maximum expected covering location problem (MEXCLP) is reformulated using a separable programming approach. The resulting formulation—nonlinear maximum expected covering location problem (NMEXCLP)—guarantees optimality and also solves more quickly than previous heuristic approaches. NMEXCLP allows two important extensions. First, minor formulation changes allow the specification of the minimum number of times each node is to be covered in order to satisfy expected coverage criteria. Second, coverage matrices can be constructed that consider two different types of coverage simultaneously. Both extensions are useful for ambulance location problems and are demonstrated in that setting.     

欠发达地区农村金融支付服务建设研究——以广西百色市为例

对百色市的调查表明，当前，农村金融支付服务供给明显改善，但也存在一些制约支付服务的因素。应充分发挥地方政府作用，助推农村金融发展，大力完善农村金融组织体系，提高支付清算效率，方便农村支付结算业务办理，努力降低支付服务体系，从而推动农村金融支付服务建设迅速发展。     

A robustness framework for monitoring real options under uncertainty

This paper presents a problem structuring methodology to assess real option decisions in the face of unpredictability. Based on principles of robustness analysis and scenario planning, we demonstrate how decision-aiding can facilitate participation in projects setting and achieve effective decision making through the use of real options reasoning. We argue that robustness heuristics developed in earlier studies can be practical proxies for real options performance, hence indicators of efficient flexible planning. The developed framework also highlights how to integrate real options solutions in firms’ strategic plans and operating actions. The use of the methodology in a location decision application is provided for illustration.     

从美联储看金融的本质——读《金融的本质——伯南克四讲美联储》

原美联储主席伯南克的《金融的本质——伯南克四讲美联储》揭示了美联储运作背后的金融的本质。从金融稳定、通胀和泡沫、监管缺失、后遗症显现等角度看金融本质,对我国金融业的发展有重要的启发意义。要深刻理解央行监管职责的重大意义,考虑金融监管的逆周期性,应对某些经济泡沫化问题,加快推进金融的市场化改革进程。     

新疆30年财政收支运行的轨迹

改革开放30年来，尤其是实施分税制以来，新疆地方财政收支的缺口越来越大，究其原因，主要是分税制财政体制使新疆上划中央税收加速增长、地方经济结构调整缓慢和资源优势尚未实现转化。因此，在未来财政收支运行中，应充分预计财政体制变革、新农村建设和新型工业化建设的需求，以及各种减收因素对财政收支的影响，促进产业结构调整是地方财政应当考虑的重要问题。     

企业财务状况与投资者关系管理--来自 IR 百强上市公司的经验证据

依据“2007年度中国最佳投资者关系管理百强”榜的评选结果,研究了企业财务状况对上市公司投资者关系管理的影响.结果表明,投资者关系管理与企业盈利能力负相关,与股东获利能力、发展能力以及企业现金流量能力正相关.研究还发现,公司规模和流通股比例有利于提升投资者关系管理水平.     

高职《财经写作》课程项目教学体系研究

转变高职教育传统的教学模式是一项重要的、具有创新意义的工作。建构主义学习理论、情境学习理论和杜威的实用主义教育理论成为构建高职财经写作课程项目教学新体系的理论依据。该课程项目教学新体系强调：以企业实际工作为行动导向，以具体情境为教学项目，以学生为主体组织教学活动，以多样化的解决问题的方法拓展学生思路，真正做到“学中做、做中用、用中学”。     

我国农村居民生育意愿转变分析

农村居民生育意愿真正开始转变是在全国推行计划生育以后,目前已发生了极大的转变,主要特征是:以期望生育两个孩子且一男一女为主流意识,还有相当比例自愿只生一个,"多子多福"观念基本没有市场,对孩子质量的追求正在替代对数量的追求。生育意愿转变的标准不应是生育政策,而应以符合可持续发展理念的要求为标准。