Two economists caught a World Bank corruption ring from digit patterns in reports

The World Bank's Arid Lands Resource Management Project ran from 1993 to 2010 across Kenya's poorest, most drought-prone districts, eventually spending $224 million on schools, water systems, goat-restocking and other village-level infrastructure administered by local district offices with minimal central oversight.

The standard remedy — a forensic audit, with investigators on the ground reconciling thousands of receipts against actual construction and actual beneficiaries — is exactly the kind of oversight weak-governance settings resist. It took the World Bank's own Integrity Vice Presidency two years, an external whistleblower complaint and negotiated access to conduct just one such audit of the Arid Lands project, and even then only about two-thirds of the underlying district reports were ever released.

Tested every digit of mandatory reports against Benford's Law, weighted by value, so fabricated totals—which inherit human psychology—show up as a signature.

Honest totals of many receipts follow Benford's Law, a predictable digit distribution.

Fabricated numbers reflect the fraudster's psychology, not arithmetic, so they deviate from that distribution.

Testing every digit place and weighting by value separates honest rounding from profit-motivated padding.

The World Bank's own forensic audit independently confirmed the same districts, validating the method.

When the people you suspect control the evidence, test the statistical fingerprint of the numbers they're required to give you, instead of seeking access you'll never get.

023) — including catching a spike in manipulated figures during Kenya's contested 2007 presidential election year, when funds were separately alleged to have been diverted into the ruling party's campaign. The Bank's own audit had found 62–75 percent of transactions suspect in four of the five districts both methods covered; the digit test rejected the null hypothesis of honest reporting for the same four districts on 6 to 7 of its 10 statistical tests. 8 million in disallowed charges, though no official was prosecuted or fired.