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It is a fact well documented by economic theory that high and durable inflation has a negative effect on economic growth, but that as the effects on the latter decline, they are non-linear. This work answers two research questions related to the works that have studied this empirical relationship in the last three decades. The first is about its external validity: How useful are they to predict the economic evolution of emerging countries? Simulating the growth of a sample of emerging markets for the past 20 years from these models, we found high and disparate prediction errors and therefore certain drawbacks when generalizing their conclusions. Understanding why this happens gives rise to the second question, linked to the internal validity of the models: What unresolved problems exist in the estimates carried out by the authors? the answer is that there are problems of specification, simultaneity and omission of variables, which generate endogeneity and hinder the causal identification of the effect of inflation on growth in the type of regressions under analysis, even in models with thresholds and non-linear.

Inflación y crecimiento a largo plazo: malas predicciones, ¿buenos modelos?