Street vending is an important source of self-employment for the urban poor. I combine observational, survey, and experimental data from Delhi to study this market. Partnering with vendors to randomize prices and passersby they solicit, I find that even with identical goods, child vendors are...

In a market where consumers choose between payment options and firms compete with products and prices, we show that payment data drives the formation of a market monopoly. A data-sharing policy can successfully restore and maintain a competitive market, but often at the expense of both...

Empirical evidence suggests consumers rely on their shopping experiences to form beliefs about inflation. In other words, they "learn by shopping". I introduce this empirical observation as an informational friction in the New Keynesian model and use it to study its consequences for the...