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LedgerLens
An open dataset and viewer for anonymised SME transaction patterns. Built for a talk, kept alive because three universities started teaching from it.
The dataset is the product; the viewer exists so the dataset can be looked at without writing code first.
Anonymisation was most of the work, and the part I would do differently is the part I thought was finished first — aggregate shapes leak more than you expect when the population is small.
© 2026 Yong Wang