Research

This paper examines the exchange rate policy in a tractable framework with heterogeneous firms, incomplete financial markets and nominal rigidities. External demand shocks generate exchange rate movements leading to uncertainty in the labor demand of exporter firms. When exporter firms are homogeneous in terms of productivity, a monetary policy response to external demand shocks stabilizes the export market and improves welfare, thus providing a rationale for managed exchange rate policies.

Relying on a novel measure of VAT compliance in a panel of 35 countries, we document a robust negative association between changes in tax compliance and tax rates. In order to rationalize this finding, we develop a theoretical framework where heterogeneous firms adjust the share of declared activity. We calibrate the model using firm-level data in Greece, and find large leakages following the recent austerity plans. We then show how differences in financial development and the size of economic activity at the margin of informality are able to explain the heterogeneous response of tax compliance to tax rates across countries.

Recessions are conventionally considered as times when the least productive firms are driven out of the market. How do credit frictions affect this cleansing effect of recessions? We build and calibrate a model of firm dynamics with credit frictions and endogenous entry and exit to investigate this question. We find that there is a cleansing effect of recessions in the presence of credit frictions, despite their effect on the selection of exiting and entering firms. This result holds true regardless of the nature of the recession: average firm-level productivity rises following a negative aggregate productivity shock, as well as following a negative financial shock. The intensity of the cleansing effect of recessions is however lower in the presence of credit frictions, especially when the recession is driven by a financial shock.

The objective of this paper is to explore the consequences of the correction of Euro area trade imbalances on real exchange rates. This analysis requires one additional dimension with respect to the standard Global Imbalances framework à la Obstfeld and Rogoff (2005), since the adjustment takes place within and outside the Euro area. Both types of adjustments are analyzed in a three-country general equilibrium model with a tradable and a nontradable sectors, and heterogeneous firms built upon Pappadà (2011). ECB (CompNet) data are used to measure the differences in firm size and productivity dispersion across Euro area countries. With respect to the surplus country (Germany), countries running a trade deficit (Spain, Italy) are characterised by a productivity distribution with a lower mean and a less fat right tail. This increases the relative price movement associated with the external adjustment because of the limited role played by the extensive margin. We show that the real exchange rate movements are underestimated when the cross-country differences in terms of productivity distributions are neglected.

In this paper, a standard model of international transfer is augmented by the introduction of firm heterogeneity. The increase in aggregate exports in response to the  transfer reflects extensive and intensive adjustments, as the sales of new exporting firms (extensive margin) contribute to the current account adjustment along with the  sales of existing exporting firms (intensive margin). The relative size of the intensive and extensive margins of the adjustment is determined by the size dispersion of  firms. The model calibrated to the observed distribution of firm sizes shows that the intensive margin is the predominant channel of the current account adjustment. The dampening effect of the extensive margin has therefore very little impact on the exchange rate adjustment.