Think for a moment about your car.It has thousands of parts, from the foam that makes the seats to the electrical wiring to the light bulbs.And for many of those parts, the world's carmakers, they are dependent on only a few suppliers.So it's hardly surprising that it is kind of tempting for those suppliers to come together and fix prices.But just imagine what that could do to the final price of your new car in the market.Except, it's not imaginary.The European Commission has dealt with already seven different car parts cartels, and we're still investigating some.Here, the Department of Justice are also looking into the market for car parts,and it has called it the biggest criminal investigation it has ever pursued.But without competition rules, there would be no investigation,and there would be nothing to stop this collusion from happening and the prices of your car to go up.Yet it's not only companies who can undermine fair competition. Governments can do it, too.