A free-trade agreement with specific rules can help make trade easier for everyone involved. By looking at how different countries set their tariffs, researchers found that having a deal where tariffs are different but balanced can lead to benefits for all. This kind of agreement can help make sure that trade is fair and efficient, and that everyone can benefit from it. Governments are willing to work together to make these agreements happen, even if it means that some groups might not have as much influence as before.