Explain what are the major barriers of entry in the monopoly market.

Followings are the major barriers of entry in the monopoly market:

1. Legal Restriction: The most common barrier to enter a market, causing monopoly, is legal restriction. State sometimes does not allow any private firm to enter industry, that are of strategic nature, and hence only state owned single firm operates in such markets.

2. Control over physical resources: Sometimes, an industry requires a scarce resource, which is owned by single firm. This ownership and control over physical resource don't let others to enter and operates.

3. Economies of scale leading to natural monopoly also is a common barrier of entry in monopoly.