RDP 2015-10: The Life of Australian Banknotes Equation (8)

F t = n = 1 t ( I n D n ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOramaaBa aaleaacaWG0baabeaakiabg2da9maaqahabaWaaeWaaeaacaWGjbWa aSbaaSqaaiaad6gaaeqaaOGaeyOeI0IaamiramaaBaaaleaacaWGUb aabeaaaOGaayjkaiaawMcaaaWcbaGaamOBaiabg2da9iaaigdaaeaa caWG0baaniabggHiLdaaaa@4544@