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Working Paper
The Expansion of Varieties in the New Age of Advertising
The last decades have seen large improvements in digital advertising technology that allowed firms to better target specific consumer tastes. This research studies the relationship among digital advertising, the rise of varieties, and economic welfare. We develop a model of advertising and varieties where firms choose the intensity of digital ads directed at specific consumers as well as traditional ads that are undirected. The calibrated model shows that improvements in digital advertising have driven the rise in varieties over time. Empirical evidence is presented using detailed micro data ...
Report
Monetizing Privacy
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 efficiency and consumer welfare. The introduction of a low-cost anonymous means of electronic payment, or digital cash, preserves the market structure and improves consumers’ welfare by enabling them to monetize their private information. We discuss the potential role of central banks in providing digital ...
Working Paper
The Rise of Nonbanks and the Quality of Financial Services: Evidence from Consumer Complaints
We show that as nonbanks' market share increases in a local residential mortgage market, the quality of mortgage services in the market improves. Two instrumental variable analyses exploiting (1) stress tests conducted by the Federal Reserve, and (2) mortgage industry surety bonds required by each state confirm this finding. We find evidence that as nonbanks grow their market share, they develop a specialty in servicing lower-income borrowers and increase investment in technology, leading to improved service quality. This improvement in service quality is more salient in counties with a ...
Working Paper
Privacy Regulation and Quality Investment
This paper analyzes whether a privacy regulation that restricts a dominant firm?s data disclosure level harms the firm?s incentives to invest in service quality and thereby harms social welfare. We study how the regulation affects the privacy and quality choices of a monopoly service provider, who derives revenues solely from disclosing user data to third parties, as well as how those choices in turn affect consumers? participation and information-sharing decisions. We show that the regulation does not always harm investment incentives; moreover, even when it does, it may still improve social ...