Chapter 4. MAMS A Computable General Equilibrium Model for Developing Country Strategy Analysis This chapter presents MAMS (Maquette for MDG Simulations) a recursive dynamic CGE model developed at the World Bank for analysis of medium to long run country strategies for low and middle income countries including strategies aimed at improving MDG (Millennium Development Goals) outcomes. Compared to other CGE models MAMS offers a unique combination of new and policy relevant features most importantly disaggregation of the government services by function broad and integrated coverage of MDGs and endogenous links between education and the labor market. The chapter provides a detailed description of MAMS the policy insights that it has generated exemplified by a case study of Yemen and the lessons learned from developing and applying MAMS to a large number of countries.