In an effort to normalize continental population imbalances, the PlanetSide development team is proposing a few changes.  In an update on the PlanetSide website, the changes are laid out.  Here's an excerpt:

The second incentive is currently under development and will be based on the real-time population balance on each continent. The Empire populations on your continent are will be evaluated continuously every 15 minutes or so. If your Empire is outnumbered 3:2 or worse, then you will immediately start receiving health maximum and experience modifiers, in addition to the 7-day average modifications being made already. No bonuses are awarded unless at least one Empire on the continent has at least 50 people present. If fewer players are present than that, no bonuses are created.

The full update, complete with numbers (for those of you who would like to crunch them), may be accessed here.