Firm Dynamics, Informality, and Monetary Policy

Abstract A prominent structural feature of many developing countries is the presence of a large shadow or informal economy, which often serves as a form of insurance during economic downturns. Despite this understanding, the impact of the informal economy on inflation and output dynamics in these countries remains poorly understood. This study investigates the extent to which monetary policy can stabilize economies with a large informal market. First, we use VAR analysis to provide new evidence indicating that the labor informality rate increases in response to contractionary monetary policy. Second, we explore the transmission mechanism of monetary policy through a two-sector New Keynesian (NK) model that incorporates endogenous firm entry. This analysis allows us to examine the role of informality in sectoral reallocation, inflation, and output dynamics. Our findings suggest that, under a reasonable calibration of the model, the presence of a flexible, informal sector results in a lower sacrifice ratio in response to a tightening of monetary policy. This suggests that informality enhances the effectiveness of monetary policy.