Briefly describe the concept and main forms of economic monopoly.

Economic monopoly means that in a market or industry, one enterprise or a few enterprises monopolize the market share, and because of its dominant market position, they can control the price, supply and market conditions. The main forms can be divided into natural monopoly, technology monopoly, industrial centralized monopoly and monopoly pricing.

1. Natural monopoly: Natural monopoly occurs in industries that need a lot of fixed costs, such as water, electricity, natural gas and other public utilities; Due to the scale effect and high fixed cost, only one or several enterprises can provide services economically and effectively, forming a monopoly market.

2. Technology monopoly: Technology monopoly occurs when an enterprise has a unique technology or patent and it is difficult for other enterprises to copy or enter the market; Enterprises with technological monopoly have long occupied a dominant position in the market, limiting the entry of other enterprises.

3. Monopoly of industrial concentration: Monopoly of industrial concentration means that only a few enterprises occupy absolute or relative market share in the market; Enterprises form a monopoly position through merger, acquisition or control of supply chain.

4. Monopoly pricing: monopoly enterprises control market prices and obtain excess profits; We can raise prices, restrict supply or manipulate market conditions to implement monopoly pricing strategy to maximize our own interests.