Covid 19 and A Wavelet Analysis of the Total Deaths per Month in Brazil since 2015
arXiv:2009.00648
Abstract
We investigate the historical series of the total number of deaths per month in Brazil since 2015 using the wavelet transform, in order to assess whether the COVID-19 pandemic caused any change point in that series. Our wavelet analysis shows that the series has a change point in the variance. However, it occurred long before the pandemic began.