Temporal recency as covariate?

[sondreus]

Very recent country-days are less probable to have full covariate sets. One way to model this explicitly would be a temporal recency variable, which took the value observation date - Sys.Date().

Relatedly, next model fit should possible use a covariate set at least as old as the most recent target data, to account for the same pattern. In concert, these could help stabilize very recent predictions.

[sondreus]

Now added in development fork