The life‐length of banknotes*
P. Koeze · Statistica Neerlandica · 1982
Abstract With the aid of the Bank's banknote sorting system the issue and subsequent withdrawal of f 25–banknotes on three varieties of paper have been recorded for two‐and‐a‐half years. The aim was to measure the durability of the three paper varieties in circulation. The results of this second trial with f 25–banknotes confirm the statistical model developed previously for the first trial with f 100–banknotes. GRESHAM's Law is equally not applicable, neither to f 25–banknotes nor to f 100–banknotes. A two‐parameter gamma distribution fits the cumulative fraction of banknotes withdrawn reasonably well.