The Asian Development Bank (ADB) prepared the Public-Private Partnership Operational Plan 2012-2020 to provide a consistent, analytical, and operational framework for scaling up public-private partnerships (PPPs) in support of Strategy 2020. ADB's PPP operations will be based on four pillars: (i) advocacy and capacity development, (ii) enabling environment, (iii) project development, and (iv) project financing. This study aims to (i) update the 1998-2008 PPP database for program/project, and technical assistance approvals with PPP content for 2009-2010; and (ii) classify ADB assistance for PPPs from 1998 to 2010 based on the four pillars of the plan.