Conflicts of Interest
Author 2 (R.B.) is the CEO of Zoey, the recommender system studied in some of the experimental conditions. He contributed to the conceptualization of the study, structuring destination information and delivering the experimental intervention, and to factual description of technology underlying recommender systems to the manuscript. He did not have access to the design of measurement instruments or study data, and did not participate in the data analysis or interpretation of results. The remaining authors have no conflicts of interest to declare. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.