How do you measure cultural influence?

Cultural influence can be measured in a variety of ways, including the number of people exposed to a particular culture, the amount of money spent on cultural activities, the number of cultural artifacts produced, the number of cultural events held, the number of people participating in cultural activities, the number of cultural organizations, the number of cultural awards won, the number of cultural publications, the number of cultural websites, the number of cultural references in popular media, and the number of cultural products sold.