Estonia participated in the OECD’s Baltic Regional Programme which from 1998 to 2004 was the OECD’s main vehicle for policy co-operation with Estonia, Latvia and Lithuania. As one of the most successful reformers in Central and Eastern Europe, Estonia not only learned from OECD members’ expertise, but also had important reform experience to share with OECD members and others, e.g. in the field of tax and deregulation. Until end-2006, Estonia also participated in SIGMA, in a programme assisting the new EU members’ decision makers and administrations in meeting the conditions for EU Membership.