Hollywood

Between 1910 and 1915, virtually all film companies moved to California. 

Originally, the independents might have left to escape the trusts...but cheap land, good weather and great access to scenery made the case for California.

However, it was really only production that moved. Finance and ownership usually stayed in the east. It's good to remember that most of the value of a company like Paramount wasn't the studio. It was the finance and holding company that owned the theatres.

About this time the star system and studio system also began.