Do tariffs inhibit trade flows by limiting the entry of exporting firms ('extensive margin') or by restricting the … tariffs promoted during the 1990s by the Uruguay Round multilateral trade agreement affected the trade margins of French firms …-varying tariffs as a measure of variable trade costs. Our results show that the number of firms exporting in a given sector to a given …

bilateral applied tariffs for each product category for the universe of available country pairs over the 2001 to 2016 period. We …

Many studies use tariffs to measure changes in trade policy. This paper shows that standard sources for tariffs suffer … from substantial measurement error due to misreporting and the resulting false imputation: Countries fail to report tariffs … every year and missing data are more prevalent for preferential than for most favored nation (MFN) tariffs. WITS, the main …