We analyse the impact of exchange rate misalignment on economic growth for a sample of emerging economies from 1970 to 2014 using a panel smooth transition regression vector error correction model. Besides, we provide a granger causality test conducted in a non-linear framework. We find that a rise in misalignment increases significantly the output in the short-run when currencies are close to equilibrium. When they are highly misaligned, the impact on growth is reduced. However, no significant impact of output on misalignment was found in the short-run. We provide evidence that misalignment granger causes the output at any given level of misalignment both in the short and long-run. Weaker granger causality was found between output and misalignment. This raises some important policy implications. Although emerging economies can use undervaluation as a growth strategy, the benefits are smaller when currencies are highly undervalued. There is, therefore, an incentive to keep exchange rates closer to their equilibrium.
Despite the large body of work that exists on the impact of exchange rate undervaluation on economic growth, only a mere literature focuses on the potential transmission mechanisms. There are authors who consider the size of the tradable sector as the operative channel through which undervaluation impacts economic growth. This is due to poor contracting environment and market failures that are prominent in the tradable sector as bad institutions "tax" tradables more than nontradables. We look at this issue in this article for a set of emerging economies using annual data from 1970 to 2014. We find that the size of the tradable sector is indeed the operative channel through which undervaluation impacts growth. We have ruled out that bad institutions "tax" tradables more than non-tradables. Our results, robust to different undervaluation indexes, highlight instead the importance of total factor productivity surge induced by an undervaluation in increasing growth.
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