Which one gives us biggest deadweight loss in economy?

1. Tariff

2. Prohibition of drugs

3. Prohibition of sex and reproductive trade

4. Citizenship and residency not being tradeable

Take into account:

Most illegal drugs, like DMT is not dangerous.

Rich men tend to have rich kids making moms happy. So if moms can sell reproductive service to richer men, then mom get more money and her children are rich too.

Tradeable citizenship means a very cost effective alternative to war. A group of people wanting to occupy a specific land just buy it slowly a city at a time. Tradeable citizenship among democratic cities/countries is effectively democratic ways to trade territories.

Gemini says 3, 4, 2, 1. What do other economists say?