Barriers to Entry:Barriers to entry are obstacles that make it difficult for new firms to enter a market and compete with existing firms. These can include legal, technological, or economic factors.
Natural Monopoly:A natural monopoly is a situation where a single firm can most efficiently serve the entire market, often due to high fixed costs and economies of scale.
Government Regulation: Government regulation can create legal monopolies by granting exclusive rights or licenses to a single provider, limiting competition in a market.