With the often costly and far-reaching implications when investors use Bilateral Investment Treaties (BITs) to adjudicate claims against developing countries, governments in the developing world need powerful arguments to justify that these treaties are in their national interest. One notable contribution to this debate has recently been put forth by political scientists Jennifer Tobin and Mark Busch, who set out to investigate the link between BITs and preferential trade agreements (PTAs). Using statistical techniques, they analyse annual data on pairs of developing and developed countries between 1960 and 2004 and conclude that BITs « raise the prospects of getting a North-South PTA with all the deeper and reciprocal obligations that these entail. »