representation+statue of liberty+mercantilism seem like a good combination to keep for the whole game.
I was going to say that one of the advantages of mercantilism as compared to free market is that when we get no trade routes with foreign civs they get no trade routes with us, so we are therefore weakening their economies by choosing mercantilism.
However, hurting their economies doesn't really help us win faster... in fact if they research fairly quickly and we exchange our valuable techs for their valuable techs, we will still cream them in terms of producing spaceship parts, because we have more cities. Trading techs around is a way to make the end of a spacerace game come quicker.