Mexico has to assume responsibility for regulating this traffic, which means more than sealing off its southern border. The government could, for example, double welfare payments to households whose male heads stay home, threaten to revoke land reform rights after years of absence in rural communities, and establish choke points on highways at the Tehuantepec Isthmus.
墨西哥必须在福克斯总统所说的“共同责任”上采取行动。美墨之间最为可行的协议、或者说可以想象得到的最佳的美国移民改革，并非是一夜之间就消除来自墨西哥以及南美的无合法证件的移民。墨西哥必须承担责任对这一人流设施管理，这就意味着做比关闭南部边境更多的事情。例如，墨西哥政府可以加倍支付男子家长留在家里的家庭的福利，威胁在离开农村社区几年后就取消土地改革的权利，并且在特万特佩克地峡的高速公路上设立检查站。