Macroeconomic models have proved useful for estimating the economic impact of energy price rises resulting from the war in Ukraine, as they take into account the scattering effects of these price hikes and the resulting knock-on effects. A simulation exercise was therefore carried out using the Mésange model of the French economy (Bardaji et al, 2017) and GEM, the multi-country model by Oxford Economics. This exercise is for illustrative purposes only, with assumptions made on energy prices, but which are not forecasts. In addition, the model used here does not take into account the economic policy measures put in place to limit energy price rises for households (thus the tariff shield is not modelled). Here too, the impacts obtained on GDP or consumption do not constitute a forecast for these figures, but are merely an illustration of their momentum in the specific context of the assumptions made relating to changes in energy prices and the chosen model. Finally, other consequences of the war in Ukraine, in terms of increased prices for commodities other than energy, disruption to worldwide value chains and to the financial system, and loss of confidence among economic agents, beyond their usual habits, are also not taken into account here...