An increasingly popular trend in online businesses is the adoption of the freemium model, in which premium features are provided along with free features. By providing free features to a large fraction of users and by managing the social interactions between users and their friends, online...

The prosperity of online shopping has led e-commerce vendors to provide increasingly rich information, particularly for experience products, to enhance consumers' shopping experience and satisfaction. However, there is little awareness that consumers may not be able to process all the...