局部搜索算法在动态建立基准地价模型中的应用

传统基准地价评估中将地价样本检验剔除与回归模型建立分离 ,不能获取最优的基准地价评估模型。应用求解组合优化问题的局部搜索算法 ,将地价样本检验与模型建立有机结合 ,通过邻域搜索来实现地价样本组合和地价模型的动态优化。对算法的关键步骤进行了设计 ,通过合理的邻域函数和约束初始解设置 ,克服了算法在搜索过程中陷入局部最小的不足。试验结果表明 ,在样本置信水平相近的情况下 ,应用局部搜索算法计算的基准地价评估模型优于传统方法的建模结果。     

Crossbred cow adoption and its correlates: Countable adoption specification search in Sri Lanka's small holder dairy sector

Considerable specification choice confronts countable adoption investigations and there is need to measure, formally, the evidence in favor of competing formulations. This article presents alternative countable adoption specifications—hitherto neglected in the agricultural‐economics literature—and assesses formally their usefulness to practitioners. Reference to the left side of de Finetti's (1937) famous representation theorem motivates Bayesian unification of agricultural adoption studies and facilitates comparisons with conventional binary‐choice specifications. Such comparisons have not previously been considered. The various formulations and the specific techniques are highlighted in an application to crossbred cow adoption in Sri Lanka's small‐holder dairy sector.     

Roles, resources and benefits of intermediate organizations supporting triple helix collaborative R&D: The case of Precarn

Triple helix collaborations involving academia, government and industry are believed vital to the success of regional technology development. However, due to differences in culture, organizational functioning and incentive mechanisms as well as the different objectives of the various actors involved, such collaboration is difficult to create and sustain. A case study of the organization called Precarn, a collaborative, which manages a program of triple helix projects, is used here to illustrate how an intermediate organization can help triple helix partnerships towards the successful commercialization of new technologies. The paper contributes to the literature on managing R&D collaborations and innovation networks using organization theories to explain why and how collaborative intermediate organizations can facilitate successful technological adoption and commercialization across innovation networks.     

Integrating job search behavior into the study of job seekers’ employer knowledge and organizational attraction

This paper reports on a study about the impact of job search behaviors and employer knowledge on organizational attraction during recruitment. A time-lagged study was conducted among job seekers from a Singaporean business school. Results indicated that preparatory job search (PJS) behaviors influenced organizational attraction through employer familiarity. PJS also moderated the effects of two-types of images – employer creativity and people focus – on organizational attraction. These findings imply that a recruitment strategy needs to consider PJS and the specific type of employer image when communicating employer-based information.     

Equilibrium Price Dispersion with Consumer Inventories

A model with two types of consumers, shoppers and captives, is constructed that leads to an equilibrium price dispersion. Shoppers may hold inventories of the good; the level of consumer inventories leads to state-dependent price dispersions. It is shown that prices and quantities display negative serial correlation. The model is tested using grocery store data, which display the predicted correlations. Journal of Economic Literature Classification Numbers: D43, L13, D83, L81.     

论旅游地理学的教学改革与创新

旅游地理学是一门伴随旅游科学的发展而逐步形成的新兴学科。旅游地理学是旅游资源课程体系的基础和核心。在旅游地理教学中实施“零距离”教学方法，实现从静态的理论阐释到动态能力培养的教学模式创新。     

英特网英语教学资源概览

网格技术的发展为英语教师提供了获取教学资料更为便捷的手段。通过参考资料类网站、英语教学网 站、网上英语论坛、英语搜索引擎等能更快、更准确地查询资料,有助于提高英语教学质量。     

产品的搜寻、经验和信任属性对手机购买行为的影响——基于焦点座谈小组的归纳性分析

产品的搜寻属性、经验属性和信任属性是影响消费购买行为的重要因素。本文运用焦点座谈小组的定性分析方法,在手机购买的情景下考察了产品的搜寻属性、经验属性和信任属性的构成维度及其对购买行为的影响。结果发现,除了传统的三大产品属性,个人属性也是影响手机购买的重要因素,这些发现可为手机制造商和经销商提供重要的营销实践参考。     

Contracts for the sale of residential real estate

I propose a model where the terms of a real estate broker's contract influence both the broker's and theseller's choices. Given equal contract, higher quality, and thus higher priced on average, houses will sell in less time. Thus, simple conditions suffice to show that a competitively set commission rate should fall as the average price rises and, since a seller's cost of waiting are higher for higher quality houses, a cartel's commission rate should rise with the average price. Because this model studies the effects of alternate contracts on observable variables such as the price of a house and its time-till-sale, its implications are testable.