The TV and film writers' strike has crossed 100 days since the Writers Guild of America and the Alliance of Motion Picture and Television Producers failed to reach an agreement on a new contract, and it's likely to have cost the California economy at least $3 billion so far.

That's according to estimates from Todd Holmes, a professor of entertainment industry management at Cal State Northridge, based on economic analysis from the last Writers Guild of America strike that started in 2007. That strike led to 37,700 lost jobs and a $2.1 billion blow to the California economy, according to the Milken Institute, an economic think tank.