Tilman Börgers works on game theory and its applications. In game theory, he has explored the implications of various assumptions regarding players' knowledge about the game that they are playing and about other players' rationality. He has also studied models in which players play a game repeatedly, and use simple learning algorithms to adjust their strategies. Börgers' research on applications of game theory concerns auctions, voting and, more generally, mechanism design. He has advised several government agencies on auctions of spectrum licenses and on gas and electricity auctions.