Constructing dirichlet multinomial from independant negative binomials
I have a dataset with ISO3 country code, Year (from 2010 to 2019), Causes of death category (24 categories in total) and number of deaths. The sum of deaths across causes is fixed. My goal is to predict the expected number of deaths for each country/cause combination for the period 2020-2023.
NB: I am not allowed to share the data but easy to simulate.