The article explores how firms adjust their prices when they form partial cartels through communication in experimental markets. The researchers used a game to simulate this scenario and found that when a partial cartel is formed, prices in the market increase for all firms. Surprisingly, prices set by cartel members and non-members can differ, which goes against what was expected. This discrepancy is due to communication helping cartel members coordinate better and reach a balanced strategy. The study highlights the importance of communication in cartels and how it affects market outcomes.