Economy
When eco-ing, which techs are advisable to get first, second, third? You can state the general case first, and then race-specific cases second.
I'm no eco-whore, but I used to get the terran population upgrades first before moving on to minerals. My rationale was that credit income was the most important, and that was the upgrade that would influence population, thus credit income. Later, I switched my philosophy and started teching minerals first, and rarely getting the terran pop upgrades, if at all. My rationale for the switch was that I usually don't have tons of terran planets under my control, thus the research is largely wasted. Which philosophy is correct?