So, when I was learning about static electricity and induction and conduction, there were several labs done where a pith ball or electroscope could be manipulated through induction when a charged object was placed near it. In the case of the little pith ball, a negatively charged piece of PVC was placed near it, which attracted the ball as electrons in the ball were moved over and it became positively charged on one side and all that jazz. Then when they touched, the ball became negatively charged as well, and was repelled rather forcefully away from the PVC, because of conduction. So, at first I figured that only metals could do things like that, but then there was a lab which involved neutral pieces of paper being charged by induction, jumping to the PVC or whatever, and then being charged by conduction, and leaping back off. Now I'm confused, because the electrostatic charge on the TV for example doesn't spit out dust like that, but it does spit out the paper as expected (I tested it). Anyways, I guess my question is, does anybody know what determines the electrostatic conductivity of a material?