We use time series forecasting to estimate missing membership activity (subscriptions, renewals, reimbursements) and members and conclude that Shakespeare and Company Project datasets include 93% of membership activity and 96% of members.

We calculated a “borrowing capacity” based on known subscription limits & discovered members went over subscription limits and Sylvia Beach got more lenient in later years. We compare to a handwritten tally from 1931: 75 books out is 2x our estimate!