"International climate cooperation urgently needs to be strengthened in order to be able to achieve the goals of the Paris climate agreement," the economists write. Extensive private investment would be needed for the green and digital transformation to succeed. For this, growth-friendly and reliable framework conditions would have to be created."In order to be able to respond comprehensively to future crises again, fiscal policy should be normalized again after the crisis without jeopardizing the economic recovery," they continue. Fiscal policy must ensure the sustainability of government finances, they argue. The European Central Bank should promptly communicate an exit strategy from the very expansionary monetary policy measures.