RDP 2015-10: The Life of Australian Banknotes Equation (4)

h ( t ) = l ( t ) / S ( t ) . MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiAamaabm aabaGaamiDaaGaayjkaiaawMcaaiabg2da9iaadYgadaqadaqaaiaa dshaaiaawIcacaGLPaaacaGGVaGaam4uamaabmaabaGaamiDaaGaay jkaiaawMcaaiaac6caaaa@429D@