“…A growing body of literature has been devoted to understanding this variation, and although it has generated important insights into this phenomenon, such research is dominated, with a few notable exceptions, by researchers working in the areas of law and economics. (Brusick et al, 2005; Sokol, 2008; Teh, 2009; Bradford and Büthe, 2015; Anderson et al, 2018; Laprévote, 2019; Bradford and Chilton, 2021; Ikejiaku and Dayao, 2021). Competition provisions in PTAs deserve more attention from international political economy scholars, not only because its practical significance has become vital in trade, investment, and development (Bartók and Miroudot, 2008; Sokol, 2008; Voigt, 2009; Büthe, 2019), but also because it provides a valuable venue to further develop existing theories on the design of international institutions.…”