“…The regulatory heterogeneity indices, in contrast, record information at a country pair level, which opens the possibility for capturing preferential agreements. To do so, detailed information on the commitments in RTAs is needed, but as has been documented in several studies (Adlung and Morris, 2010;Adlung and Miroudot, 2012) RTAs typically do not go beyond, at best, binding existing levels of openness. Using existing regulation that applies on an MFN basis should therefore give a fairly accurate description of both the level and the differences in services trade restrictions.…”