Seasonality in COVID-19 times

Econ Lett. 2022 Feb:211:110206. doi: 10.1016/j.econlet.2021.110206. Epub 2021 Dec 15.

Abstract

COVID-19 hit the economy in an unprecedented way, changing the data generating process of many series. We compare different seasonal adjustment methods through simulations, introducing outliers in the trend and seasonality to reproduce the heterogeneity in the series during COVID-19.

Keywords: COVID-19; CiSSA; Deseasonalizing; Outlier; X-13ARIMA-SEATS.