When people are contemplating starting a new enterprise, the last thing they are worried about is the tax rate their heirs might have to pay if they die as billionaires. (Illustration by Lina Müller | Column by Richard Thaler on Bloomberg View)

When people are contemplating starting a new enterprise, the last thing they are worried about is the tax rate their heirs might have to pay if they die as billionaires. (Illustration by Lina Müller | Column by Richard Thaler on Bloomberg View)