This article will be part of my annual dive in R; the idea will be to use two R libraries in time-series forecasting and causal inference. I wanted to write an article for a long time, but I never found the time/resources to do it mostly because I was missing a real dataset to do it but guess what year 2020 came to my rescue. During this COVID / lockdown, most of this event’s impact is negative in our society from the economic mortality perspective. Still, I was thinking during Montreal’s lock