“…6 To address this endogeneity issue, we formulate an instrumental variable (IV) and perform two-stage IV regression. To extract the exogenous component of the sales to customers, in the first-stage regression we follow previous studies by regressing sales to customer on one additional IV, foreign exchange derivative usage by firm's lenders and underwriters (FX; Ashcraft & Santos, 2009;Kim et al, 2018;Martin & Roychowdhury, 2015;Saretto & Tookes, 2013;Subrahmanyam et al, 2014Subrahmanyam et al, , 2017. 7 Then, in the second-stage regression, we take the predicted value of the first-stage regression as the key variable of interest.…”