Online Data Appendix for: “Buyer-Seller Relationships in International Trade: Evidence from U.S. State Exports and Business-Class Travel”

The Online Data Appendix is organized in two parts. Part I provides a detailed description of the steps involved in constructing the restricted sample of international travel and trade flows used in the empirical part of the paper. The focus is primarily on the treatments applied to the original air travel dataset DataBank 1B (DB1B) Passenger Origin and Destination Survey, provided by the US Department of Transportation (DOT). While this dataset is new to the trade literature, it has been previously employed in empirical industrial organization studies (Brueckner, 2003; Whalen, 2007, and references therein), so my approach in preparing the air travel data follows in many respects previous practice. Part II compares the air traffic measures computed from the DB1B dataset with corresponding representative values from the T100 Market dataset in order to gauge the likelihood of measurement bias in the estimation sample.