One of the problem IMHO is that the concept of "market" in a global economy is very blurry. What is a monopoly in this context ? does having 99% market share i

One of the problem IMHO is that the concept of "market" in a global economy is very blurry. What is a monopoly in this context ? does having 99% market share in the US constitutes a monopoly if a chineese competitor has twice the number of users ? Are you going to dismantle google and amazon, only to see baidu and alibaba reap the market ?