The article explores how mergers affect market power in a competitive setting. It shows that the impact of a merger on competition depends on how concentrated the market is and how sensitive customers are to price changes. In simple terms, if demand for a product goes up when prices drop, mergers can lead to more market power. However, if demand doesn't change much with price, mergers may not have as big of an impact. The study suggests that certain types of demand, like linear or constant elasticity demands, are more likely to be affected by mergers in this way.