Mesopotamian administrative and accounting practice

Modern freight-forecasting formulas and fraud-detection statistics were never built with four-thousand-year-old clay tablets in mind, yet that is exactly what the conjectures on this page test them against. Early Mesopotamian bureaucrats, ruling first under the Ur III dynasty and then its Old Babylonian successor states, kept receipts, ledgers, and ration logs in such bulk, and with such consistent dates, quantities, and place names -- one livestock depot alone, at the site now called Puzrish-Dagan, logged incoming animals continuously for decades -- that modern tools built for freight statistics and accounting fraud can be pointed directly at them.

The gravity ledger applies a gravity model, the same equation used to predict modern freight flows from the size and distance of trading partners, directly to Ur III delivery records. The rounding gradient looks for a systematic rounding bias in recorded quantities, the kind an accounting system under time pressure would produce. The intercalation detector and Calendars die a generation late both test how quickly a calendar reform actually took hold across the administration, expecting old habits to persist a generation past the official change.