Description

We examine the impact of income heterogeneity on macroeconomic dynamics by analyzing households' expenditure decisions across different goods over the business cycle. Using Chilean transaction-level expenditure data, we observe income-dependent systematic variations in expenditure shares over the business cycle, suggesting a relevant role for non-homothetic preferences. We embed these preferences into a Heterogeneous Agent New Keynesian model and analyze their influence on the transmission of fiscal transfers. We find two novel channels associated with non-homotheticities: aggregate consumption sensitivity to income and insurance through expenditure switching. In a calibration for Chile, we find that non-homotheticities lead to substantial amplification of the effects of fiscal transfers of up to fifty percent.