This study tested how different rules and ownership setups affect fairness and efficiency in bargaining games. They found that when property rights are unclear and fairness principles aren't met, agreements become less efficient. This means that without clear rules about who owns what, agreements are more likely to be unsatisfactory for everyone involved. The researchers showed that having a clear framework for ownership can lead to better results in negotiations. In cases where ownership isn't well-defined, there are more inefficient agreements and more repetitive bargaining sessions. So, having clear property rights can help avoid these problems and make deals more successful.