Hourly Energy Prices in Spain: Evidence of Persistence Across Different Months

Abstract

We examine the hourly structure of energy prices in Spain using 12 one-month-long series (from November 2020 to October 2021) of samples of hourly pricing (from 00:00 to 23:00) for each day of the month and applying a long memory approach with fractional integration analysis. Our results indicate that the series are highly persistent, with shocks having permanent effects with non–mean reversion properties, with no month-specific effects on the data series.