It seems like the EVE economy is player-driven, since players get to set prices for their sales and purchases. The reality, however, is that there are coercive influences that, most optimistically, provide boundary conditions on the economy, but, realistically, poison and drive it. Here are a few of the circumstances that make EVE's economy not player-driven:

• Natural resources are arbitrarily limited. This comports with the real world, sure, but we're talking about a game and discussing player-driven economies. You don't want natural resources to be unlimited and unthrottled, but when considering the balance between availability and effort to acquire, EVE is so dramatically on the side of restricting availability as to remove effort to acquire entirely from the picture. There is so little effort required to acquire resources, once territory has been captured, that several of the notable major alliances don't harvest them at all. I am all too intimately acquainted with the real-money negotiations certain major alliances routinely engage in with ISK sellers for harvesting privileges.
• CCP has established territorial ownership mechanics which disproportionately reward those who already have territory over those who would acquire it. Defense is far too heavily weighted over assault, which, when coupled with the catastrophically small map (another arbitrary limitation), results in a total absence of frontier and grossly limited opportunity to displace, giving existing territory-holders coercive pricing influence.
• CCP continues to create market-breaking systems within the game. Every time they make a half-hearted swipe at revamping FacWar, for instance, they create more mechanisms by which their fiat currency enters the game, generating market exploits and inflating the economy. Then they introduce more ISK sinks to try to balance their colossal screw-ups, resulting in both more market exploits and greater market disruption.

EVE's economy is only nominally player-driven. In reality, it is a detestable amalgam of the CCP-protected influences of key alliances and the forceful disruptions of CCP attempts to band-aid their mistakes.