We evaluate the effects of an online self-assessment tool on teachers' competencies and beliefs about ICT in education. The causal impact of the tool is evaluated through a randomized encouragement design, involving 7,391 lower secondary teachers across 11 European countries. Short-run impact...

It is often assumed that consumers benefit from the internet because it offers a "long tail" with more variety of products to choose from. However, search costs may block the long tail effect and result in the dominance of superstars. This paper examines the variety hypothesis in the entire...

Tourist taxes represent one of the principal sources of revenue for a number of local authorities. Using a dataset of more than 300 thousands reviews on TripAdvisor, we analyze the effect of tourist taxes on online ratings posted by hotel costumers. Online ratings are strategic variables for the...

Online retail is a multi-billion-dollar industry in the United States. Consumers enjoy the ease with which they can browse, click, and order goods from the comfort of their own homes. Though it may come as no surprise to most lawyers, retailers are taking advantage of online transactions by...