SFINTLWARr,t=((0.1420+0.0012*INFMORr,t−0.0006*TRADEOPENr,t)+F(POLITYDEMOCr,t,YTHBULGEr,t,GDPMAr,t,SFINTLWARMAr,t))*𝐬𝐟𝐢𝐧𝐭𝐥𝐰𝐚𝐫𝐦r,t
where
<math>TRADEOPEN_{r,t}=(X_{r,t}+M_{r,t})/GDP_{r,t}