Jeroen Oskam, Jean-Pierre van der Rest, Benjamin Telkamp (2018), Journal of Revenue and Pricing Management 17(5): 311-323. https://link.springer.com/article/10.1057/s41272-018-00157-3 This paper seeks to clarify the nature of the urban vacation rental business, in particular in relation to the so-called ‘‘Sharing Economy,’’ by analyzing the dynamic pricing behavior of Airbnb hosts in Amsterdam. It explores Airbnb’s host ‘‘professionalization,’’ building on the strategic management literature showing efficient pricing behavior to be the result of an acquired capability required to interpret complex and incomplete information. Through an analysis of 11,264,907 daily observations from 32,815 units, it finds that hosts who adjust their prices more frequently outperform others in RevPAR, ADR, and occupancy. Specifically, it finds that the number of properties per host (as an indicator of Airbnb professionalization) is positively associated with RevPAR, ADR, occupancy, and number of reviews through the number of negative price changes, respectively mean negative price change, and that this effect differs depending on the level of the number of positive price changes, respectively mean positive price change. Implications for social and academic perspectives on Airbnb as ‘‘Sharing,’’ and research on the externalities of urban vacation rentals are discussed.