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- Construcción de gráficos de abanico con bandas asimétricas: una aplicación para el pronóstico de inflación en Costa RicaThe calculation of error bands of equal size around a forecast bypasses possible asymmetries in the downward or upward pressures that the forecast may face. The goal of fan charts with asymmetric error bands is to provide the most complete assessment made by the Central Bank of the pressures on the factors that impact the forecasted variable, as well of their variability. This document presents the methodology used by the Central Bank of Costa Rica to carry out such assessment in order to generate fan charts with asymmetric error bands for its inflation forecasts. The implementation is based on the seminal works by Britton, Fisher and Whitley (1998) and Blix and Sellin (1998).