The study looked at how having the same rules for trade agreements can affect how Thai exports use different free trade agreements. They found that when the rules are similar across agreements, it can make it easier for companies to use multiple agreements without too much hassle. But if the rules are too different, it can make it harder for companies to take advantage of multiple agreements. Specifically, when the rules focus on changing tariff classifications or the value added to products, it can help companies use multiple agreements more easily.