Keynesian model. Relative to Representative Agent (RANK) models, our framework introduces a precautionary-savings channel, as … households in both countries face uninsurable income risk, and a real-income channel, as households have heterogeneous marginal … propensities to consume (MPC). While both channels amplify the size of spillovers/spillbacks, only precautionary savings can change …

broadly, the transformation of savings into future capital input. We find that this shock is the most important driver of U …