Recent years have seen the emergence of new so-called “mega-regional” trade agreements. The two most prominent megaregionals currently being negotiated in the Asia -Pacific region are the Trans-Pacific Partnership (TPP) and the Regional Comprehensive Economic Partnership (RCEP). Both these arrangements encompass countries that comprise a major share of world trade and are intended to be deep integration partnerships which will not only reduce tariffs on traded goods but also improve regulatory compatibility and provide a rules-based framework for foreign investment...