In this book Ariel Ezrachi and Maurice Stucke take a hard look at today's app-assisted digital shopping. While consumers reap many benefits from online purchasing, the sophisticated algorithms and data crunching that make browsing so convenient are also changing the nature of market competition,...

I study the positive relationship between prices of tradable goods and per-capita income. I develop a highly tractable general equilibrium model of international trade with heterogeneous firms and non-homothetic consumer preferences that positively links prices of tradables to consumer income....

Online price dispersion has remained a puzzle for many years. In this article, we test the effects of a range of factors identified in the literature including vendor strategy, market structure, vendor heterogeneity and the time dimension. We use a dataset collected from the Amazon.com,...

I study the positive relationship between prices of tradable goods and per-capita income. I develop a highly tractable general equilibrium model of international trade with heterogeneous firms and non-homothetic consumer preferences that positively links prices of tradables to consumer income....