RDP 8604: Leading Indexes - Do They? Equation

ε 2t =ρ ε 1t + u 2t MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeqyTdu2aaS baaSqaaiaaikdacaqG0baabeaakiabg2da9iabeg8aYjabew7aLnaa BaaaleaacaaIXaGaaeiDaaqabaGccqGHRaWkcaqG1bWaaSbaaSqaai aaikdacaqG0baabeaaaaa@4394@