This poster presents the macro-economic analysis of the impact of Green Public Procurement of certified wood products in one continent on the wood markets of other continents. A Spatial Equilibrium Model is used to measure the global economic impact of both instruments. At present, certification is promoted as a useful tool for the sustainable management of (tropical) forests in countries with weak governments. This poster however demonstrates that the green public procurement of certification wood does not always result in the hoped-for positive welfare effects. In specific situations, the increased demand for certified wood can even entail a negative effect.