In his secret identity, Batman is Bruce Wayne, a wealthy businessman who lives in Gotham City. To the world at large, Bruce Wayne is often seen as an irresponsible, superficial playboy who lives off his family's personal fortune (amassed when Bruce's family invested in Gotham real estate before the city was a bustling metropolis) and the profits of Wayne Enterprises, a major private technology firm that he inherits. However, Wayne is also known for his contributions to charity, notably through his Wayne Foundation. Bruce creates the playboy public persona to aid in throwing off suspicion of his secret identity, often acting dim-witted and self-absorbed to further the act.
Writers of both Batman and Superman stories have often compared the two within the context of various stories, to varying conclusions. Like Superman, the prominent persona of Batman's dual identities varies with time. Modern-age comics have tended to portray "Bruce Wayne" as the facade, with "Batman" as the truer representation of his personality (in counterpoint to the post-Crisis Superman, whose "Clark Kent" persona is the 'real' personality, and "Superman" is the 'mask').