Filip Matějka


E-Mail: Filip.Matejka@cerge-ei.cz
Institutional Affiliation: CERGE-EI

NBER Working Papers and Publications

May 2020The Value of Time: Evidence From Auctioned Cab Rides
with Nicholas Buchholz, Laura Doval, Jakub Kastl, Tobias Salz: w27087
We recover valuations of time using detailed data from a large ride-hail platform, where drivers bid on trips and consumers choose between a set of rides with different prices and waiting times. We estimate demand as a function of prices and waiting times and find that price elasticities are substantially higher than waiting-time elasticities. We show how these estimates can be mapped into values of time that vary by place, person, and time of day. We find that the value of time during non-work hours is 16% lower than during work hours. Most of the heterogeneity in the value of time, however, is explained by individual differences. We apply our estimates to study optimal time incentives in highway procurement. Standard industry practices, which set incentives based on a uniform value of ti...
March 2015Social Learning and Selective Attention
with Andrew Caplin, John Leahy: w21001
Popularity is self reinforcing. The attention garnered by popular options propels further interest in them. Yet rather than blindly follow the crowd, most pay attention to how well these items match their tastes. We model this role of social learning in guiding selective attention and market dynamics. We confirm that attention focuses on options that quickly achieve popularity. Information externalities render the chosen set smaller than socially optimal. This rationalizes antitrust policies that encourage early experimentation. When attention costs are based on Shannon entropy, optimal policies are computable. With rich data, optimal choices can be identified for all consumer types.

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