A third way to define power is in terms of the ability to structure an environment of choice, to determine the “rules of the game” of some sphere of human activity. Also called structural power, this notion focuses on how individuals or groups of individuals influence “regimes” –sets of rules, norms, procedures, and institutions in a particular area. An example of structural power would be the ability of the Motion Picture Association to prevent government censorship of movies by adopting a variety of self- regulatory measures (such as voluntary ratings schemes)