事实上，我们的研究表明，若互相承诺协议包括严格的来源国限制，则地区内贸易将增加，与其他国家的贸易会削弱，发展中国家损失最大。
Indeed, our research shows that when mutual-recognition agreements include restrictive rules of origin, intra-regional trade increases – at the expense of trade with other countries – and that developing countries tend to suffer most.