In Monaco, more than two in every five residents are millionaires — the highest share of any city on Earth, packed into a country smaller than New York's Central Park. Most residents pay no personal income tax, and you could walk from one end of the whole nation to the other in about an hour

In Monaco, more than two in every five residents are millionaires — the highest share of any city on Earth, packed into a country smaller than New York's Central Park. Most residents pay no personal income tax, and you could walk from one end of the whole nation to the other in about an hour

You can walk across Monaco. Not around it, across it, from the French border on one side to the French border on the other, and it takes about an hour on foot along a route of roughly four kilometers. Somewhere in the middle of that stroll you will have passed through the entire length of a sovereign country, with its own head of state, its own flag and its own seat at the United Nations. Most people would clock it as an expensive neighborhood. …