There are high economic expectations concerning the emergence of Big Data: a promised golden age for both consumers and firms. Digital technology allows firms to provide digital services in exchange of personal data, from which they can finetune their supply to better match market demand. By...

We study the effects of competition in a context in which people's actions can not be contractually fixed. We find that in such an environment the very presence of competition does neither increase efficiency nor does it yield any payoff gains for the short side of the market. We also find that...