The study looked at 62 industries in Korea from 1976-81 to see how market structure affects entry and performance. The results show that high profits lead to more companies entering the market, which then lowers profits. This supports the idea that companies with market power can control prices. Despite government involvement, the market seems to be working as expected, with profits influencing competition. However, the idea that companies set prices to limit competition doesn't seem to hold true in this fast-growing economy.