Shaghil Ahmed

Government budget deficits and trade deficits: are present value constraints satisfied in long-term data?

We undertake tests of whether long term data from the U.S. and U.K. are consistent with the intertemporal government budget constraint and the intertemporal external borrowing constraint being satisfied in expected value terms, both individually and simultaneously. An historical perspective is appropriate for focusing on whether the present value constraints (PVCs) continue to hold in the face of unusual events, such as the outbreak of wars, that cause a structural break in the short-run dynamic behavior of the variables. This provides a very strong test of whether intertemporal budget constraints are satisfied. Our main results are: (i) the PVCs hold over the whole sample period; and (ii) the data are also consistent with the hypothesis that the PVCs continue to hold following events which cause a structural break in the short-run dynamics.

Sources of economic fluctuations in Latin America and implications for choice of exchange rate regimes

This paper studies the sources of economic fluctuations in three key Latin American countries (Argentina, Brazil, and Mexico) using a dynamic panel model, distinguishing between external and domestic shocks. The primary motivation is to examine the implications for the choice of monetary and exchange rate regimes, including dollarization. The results do not provide a strong, clear case in favor of a particular policy choice. On the one hand, foreign output shocks, including those of the U.S. appear to have a quite limited role in driving output fluctuations in these Latin countries; this absence of common shocks undermines the case for a rigidly fixed exchange rate regime. On the other hand, the historical experience of these countries indicates that real exchange rates are not very responsive to external shocks, in general, and that exchange rate depreciations tend to be contractionary in the short run. This suggests that rigidity of exchange rates may not be as costly for these countries as economic theory leads us to expect. Although the historical experience of these countries is certainly relevant, the caveat that it is characterized by several failed fixed exchange rate regimes, thereby making it a less than ideal testing ground for evaluating a pure floating exchange rate system, should be noted.

International financial spillovers to emerging market economies: How important are economic fundamentals?

We assess the importance of economic fundamentals in the transmission of international shocks to financial markets in various emerging market economies (EMEs). Our analysis covers the so-called taper-tantrum episode of 2013 and six earlier episodes of severe EME-wide financial stress since the mid-1990s. Cross-country regressions lead us to the following results: (1) EMEs with relatively better economic fundamentals suffered less deterioration in financial markets during the 2013 taper-tantrum episode. (2) Differentiation among EMEs set in quite early and persisted throughout this episode. (3) Controlling for economic fundamentals, we also find that, during the taper tantrum, financial conditions deteriorated more in those EMEs that had earlier experienced larger private capital inflows and greater exchange rate appreciation. (4) For earlier episodes, we find little evidence of investor differentiation across EMEs being explained by differences in their relative vulnerabilities during EME crises of the 1990s and early 2000s. (5) That said, differentiation across EMEs based on fundamentals does not appear to be unique to the 2013 episode. Differences in economic fundamentals played a role in explaining the heterogeneous EME financial market responses during the global financial crisis of 2008, and the role of fundamentals appeared to progressively increase through the European crisis in 2011 and subsequently the 2013 taper tantrum.