基于制造业转型下的多属性关联的产品服务方案决策研究

受当下企业产业链扩展的影响,制造业正处于转型升级的关键时期,服务型制造业已成为制造企业获取市场竞争优势的主要手段,主要为客户提供产品服务方案来满足客户个性化需求,产品模块与服务模块如何组成已成为决定服务型制造企业能否转型成功的关键所在。本文以产品服务系统方案的形成过程为基础,刻画了产品模块与服务模块的选取过程,基于Choquet积分算子构建了在产品服务属性相关联下的产品模块与服务模块的决策模型,并给出了相应求解方法,最后通过算例验证了该理论的实践性。研究结果表明:产品模块与服务模块属性的关联性有助于实施产品服务方案,解决客户问题。     

Regulations for the Eighth International Congress of Actuaries

Abstract

The present paper proposes and investigates a procedure for numerical evaluation of the transition probabilities for a time-inhomogeneous Markov process when the intensities are known (estimated). The procedure is based on Taylor-expansion of the transition probabilities linked with the Chapman-Kolmogorov equations.     

新课程背景下师范生数学交流能力的培养

基础教育新数学课程在基本理念和具体内容上都发生了较大变化，这些变化对师范生提出了许多新的挑战和期待。高等师范院校教师在培养师范生数学交流能力时，要注意以下几点：教材编写要为学生留有交流的空间；因地制宜做好发展课程；尝试新的教学方法；培养学生快速阅读科技类文章；交流可以作为评价学生学习的一种方式；高等师范数学教师之间相互交流。     

我国高师地理专业旅游地理教学改革探索

本文主要论述了我国高师地理专业旅游地理教学改革的依据,并集中阐述了旅游地理教学在课程设置、教材建设、教学方法以及师资建设中存在的主要问题,同时根据实际情况,对我国高师地理专业旅游地理教学提出了有效的构想,体现了旅游地理教学改革的必要性。     

A non-additive multiple criteria analysis method for evaluation of airline service quality

Subjective preferences with interactive property are often involved in the evaluation of airline service quality. It may not be possible, however, to correctly evaluate service quality using conventional additive measures. The fuzzy measure, which is a non-additive measure, is more suitable for this situation. Given the presence of arduousness in current fuzzy measure identification and in the calculation of the comprehensive performance values of alternatives in terms of the Choquet integral, this paper proposes the λ_k fuzzy measure and introduces Marichal entropy of the λ_k fuzzy measure to reach a solution. This paper also presents the aggregator Choquet integral with respect to the λ_k fuzzy measure. To verify the method's effectiveness, an application study of the comprehensive performance of 15 US airlines was conducted, using data collected over a 10-year period. Our results show that the proposed method is a suitable multi-criteria analysis method, which can be used to evaluate the performance of airline service quality when man–made interaction phenomena are not existent.     

Dynamics of Stock Prices and Exchange Rates Relationship: Evidence From Five Sub-Saharan African Financial Markets

This article examines the dynamic relationship between stock prices and exchange rates for five Sub-Saharan African financial markets: Ghana, Kenya, Mauritius, Nigeria and South Africa. It uses weekly data, covering the floating exchange rate regime from January 14, 2000, to December 31, 2009, and applies both the Vector Autoregression and the Dynamic Conditional Correlation models. Results from the Vector Autoregression model suggest no evidence of cointegration between stock prices and real exchange rates for all the five countries in the sample. Results from the dynamic conditional correlation show that the correlation coefficients are not constant for the period under study, and the estimates largely show a negative time-varying correlation for all the countries except Ghana that indicates a positive correlation.     

Attitudes toward Use of Advertising and Various Media Practices by Physicians

Advertising by physicians is a relatively recent phenomenon. The purposes of this study were to determine (a) consumers’ attitudes toward advertising by physicians; (b) whether certain potential consumer demographic variables account for any significant difference in attitudes toward physicians who advertise; and (c) which media consumers feel are appropriate for physicians’ advertising. The intent was to discover information that would be useful to physicians in planning promotional strategies and improving the quality of their advertising. The study seems to confirm the belief of many professionals that advertising and promotion clearly have a place in the future of health care services.     

A STRUCTURAL RISK‐NEUTRAL MODEL FOR PRICING AND HEDGING POWER DERIVATIVES

We develop a structural risk‐neutral model for energy market modifying along several directions the approach introduced in Aïd et al. In particular, a scarcity function is introduced to allow important deviations of the spot price from the marginal fuel price, producing price spikes. We focus on pricing and hedging electricity derivatives. The hedging instruments are forward contracts on fuels and electricity. The presence of production capacities and electricity demand makes such a market incomplete. We follow a local risk minimization approach to price and hedge energy derivatives. Despite the richness of information included in the spot model, we obtain closed‐form formulae for futures prices and semiexplicit formulae for spread options and European options on electricity forward contracts. An analysis of the electricity price risk premium is provided showing the contribution of demand and capacity to the futures prices. We show that when far from delivery, electricity futures behave like a basket of futures on fuels.     

Determinants of Bank Profitability in a Developing Economy: Empirical Evidence from the China Banking Sector

The Chinese banking sector has undergone noteworthy financial reforms, which significantly metamorphosed the banking system. This article seeks to examine the determinants of the profitability of the Chinese banking sector. The empirical analysis is confined to the four State Owned Commercial Banks (SOCBs) and the 12 Joint Stock Commercial Banks (JSCBs) during the postreform period of 2000–2007. The empirical findings of this study suggest that size, credit risk, and capitalization are positively related to the profitability of China banks, whereas liquidity, overhead costs, and network embeddedness have negative impacts. However, the impact of liquidity is not uniform across bank types. We find that the SOCBs with higher level of liquidity tend to be relatively more profitable, which could be vindicated by the significant amount of lending to the State Owned Enterprises. The impact of economic growth and inflation are always positive whether we examine the SOCB or the JSCB.     

BEHAVIORAL PORTFOLIO SELECTION: ASYMPTOTICS AND STABILITY ALONG A SEQUENCE OF MODELS

We consider a sequence of financial markets that converges weakly in a suitable sense and maximize a behavioral preference functional in each market. For expected concave utilities, it is well known that the maximal expected utilities and the corresponding final positions converge to the corresponding quantities in the limit model. We prove similar results for nonconcave utilities and distorted expectations as employed in behavioral finance, and we illustrate by a counterexample that these results require a stronger notion of convergence of the underlying models compared to the concave utility maximization. We use the results to analyze the stability of behavioral portfolio selection problems and to provide numerically tractable methods to solve such problems in complete continuous‐time models.