Lipschitz stability of an inverse boundary value problem for a Schr\"{o}dinger type equation

In this paper we study the inverse boundary value problem of determining the potential in the Schr\"{o}dinger equation from the knowledge of the Dirichlet-to-Neumann map, which is commonly accepted as an ill-posed problem in the sense that, under general settings, the optimal stability estimate is of logarithmic type. In this work, a Lipschitz type stability is established assuming a priori that the potential is piecewise constant with a bounded known number of unknown values

Exploring Cross-National Differences in Online Review Topics between China and the United States

The fast growing cross-border e-commerce makes it imperative for online merchants to deeply understand the cross-national differences in consumers’ preferences and online shopping behaviors. Using a data-driven topic model, this study plans to investigate the semantic differences in online product reviews posted by consumers from China and the United Sates. The preliminary results from a pilot study of online reviews of books show that Chinese reviewers focus more on a product’s concrete attributes while American reviewers prefer to express their general evaluations of the product

Effects of Aggregate Rating on eWOM Acceptance: An Attribution Theory Perspective

Online shoppers are increasingly relying on electronic word-of-mouth (eWOM), which refers to Internet-mediated opinions and recommendations on products and services from experienced consumers, to optimize their purchase decisions and reduce purchase risks. Anchored on the attribution theories, this research investigates how consumers would process and respond to the rich information provided by a eWOM system. More specifically, it examines the potential interactions between two eWOM components, namely aggregate rating and individual review, on consumers’ recommendation acceptance. The results from a laboratory experiments revealed that when a positive customer review is accompanied with negative aggregate rating, consumers are more likely to attribute the review to non-product-related factors rather than product-related factors. However, this effect is not significant when the customer review is negative. In addition, product-related attributions have positive impacts on a review’s perceived diagnosticity and credibility, both of which could increase the likelihood of consumer acceptance

A Service Integration Model of Value Creation: A Study of Commercial Online Communities

This paper presents a service integration model through a study of major for-profit online communities in both North America and China. Our study examines various types of communities and proposes particular means by which these communities might integrate their services with each other. Three integration strategies are identified: vertical integration, horizontal integration, and hybrid integration. The underlying mechanisms, as well as strategies that are needed to design and implement services, are also discussed