Since 1991, radical changes have taken place in the policy and institutional environment governing the agriculture sector in Zambia. Policies of liberalization and privatization have entailed the replacement of previously state-supplied agricultural services (notably credit, inputs supply and agricultural marketing) by private sector provision. The Agricultural Sector Investment Program (ASIP), assisted by the World Bank, provides the context for continuing agricultural policy development, as well as for the integration of previously fragmented projects and programs in the sector. ASIP is predicated upon participation in program design and implementation by the full range of stakeholders in the public, private and non-governmental sectors. As a means both of improving program implementation and of promoting the active participation of beneficiaries and other actors, ASIP has established systematic and regular feedback between policy makers and service providers, and those affected by programs, using methods such as Participatory Rural Appraisal.