Wikipedia content contributions represent $3.8B/year in equivalent labor value, making it one of the highest-value open knowledge repositories ever created.

Open source economics methodology. Hourly value × contribution hours.

Replacement cost method — what would it cost to recreate Wikipedia?

Innovation multiplier from accessible knowledge factored in.

Peer production valuation from academic literature.

Wider definition including developer time saved.

Systems dynamics model of knowledge network effects.

Cross-verified with independent contribution counting.

Stack Exchange comparison for developer labor value.

Conservative — no speculative future value included.