Initial Release -- Factors from the published paper

1. permno_SC.tsv.gz: Shipping Costs and their respective quintiles for every firm in our sample (by permno). File is compressed.

2. ShippingCosts_returns.tsv: Set of equally-weighted and value-weighted portfolio monthly returns by quintiles of Shipping Costs; from low Shipping Costs (more exposed to import competition) to high Shipping Costs.