Common causes of deadweight losses are monopoly pricing (or even pricing in markets with high fixed costs[?]), externalities or taxes or subsidies.
... (Brazil) 1991 - Ayrton Senna, (Brazil) 1992 - Ayrton Senna, (Brazil) 1993 - Ayrton Senna, (Brazil) 1994 - Michael Schumacher, (Germany) 1995 - Michael Schumacher, ...