Productivity is a general measurement for a planet work %, higher productivity will yield better credits, unit production and resources

Things that effect productivity:
- happiness
- working percentage
- workers ratio
*In order to have 100% Productivity your number of mine or commercial workers cannot exceed your number of industrial workers.

Income is effected by productivity in the following way:

(amount gathered from workers) * Productivity

Researching Entertainment allows you to go over the 100% Happiness/Productivity cap. For every 0.5% happiness beyond the 100% cap, you get a 0.25% increase in the Productivity cap.