In this paper, we assess the eects of temporary …scal shocks on the Canadian economy using the structural vector autoregression ap- proach. We consider distinct shocks to government spending and tax revenues, and we confront three types of identi…cation approaches. The …rst one is the recursive approach based on the Cholesky decom- position. The second approach follows Blanchard and Perotti ... [Show full abstract] (2002) and Perotti (2004) who employed elasticities estimated using informa- tion on the tax system to identify the VAR model. In the last one, we impose restrictions on the sign of the variables'responses to the shocks along the lines of Mountford and Uhlig (2005). We …nd that the eects of the government revenues shock are more robust across the identi…cation approaches than the shock to government expendi- tures. For all the identi…cation approaches, the shock to government expenditures has a bigger impact on GDP than the net tax revenues shock in the very short run. However, on a horizon of two years, the revenues shock dominates because it has a larger stimulating eect on the other components of GDP. In light of our …ndings, we view a speci…cation of the Blanchard and Perotti (2002) model in which the zero output elasticity of government expenditures assumption is dropped as the one leading to the most credible results.