Whenever Buffet invests in something, part of the reason is always that he has identified that it has monopolistic or cartel like characteristics- or it can buy

Whenever Buffet invests in something, part of the reason is always that he has identified that it has monopolistic or cartel like characteristics- or it can buy out competitors and gain some of those characteristics through his investment. Would love to see this article rewritten to analyze the dominance of these firms in their market.