Why would I use the global market share to determine if someone has a monopoly, though? It seems like a flawed way to determine how much choice consumers have.
For example, there's a monopoly on garbage service where I live, but he company with the monopoly has basically 0% of the world market.
For example, there's a monopoly on garbage service where I live, but he company with the monopoly has basically 0% of the world market.