Okay, so, Civ makes stealing techs possibly cheaper than researching them yourself, but this isn't guaranteed. One of the main factors affecting the cost of stealing a tech is the base cost factor that is decided by the ratio of your EPs to the other civ's EPs. In my games I often assign EPs to the relative threat of the civ. I'll have a few civs getting most of my EPs with the rest getting very little. What I'm wondering is this: does it make more sense to just concentrate all EPs on the tech leader? That would allow for cheaper tech steals, but would mean no passive espionage information on the other civs. Demographics, visibility and research path are nice things to know.