May 2025
Fiscal Multipliers in Small Open Economies With Heterogeneous Households
Abstract: We study fiscal multipliers in a small open economy Heterogeneous Agent New-Keynesian
(SOE-HANK) model. We provide a set of equivalence results under which the fiscal multiplier in our
SOE-HANK model is the same---at any horizon---as in a corresponding representative-agent (RANK) model.
Under more general assumptions, the fiscal multipliers in the two models are not equivalent, but remain
relatively similar. Yet, we show that the underlying channels driving the fiscal multipliers differ
substantially. In particular, consumption increases while net exports tend to decline in the HANK model,
whereas the opposite is true in the RANK model.