Similar to pra_1975(), performs some manual assignment.
adds paris via paris_pra_1950s_labour().
pra_1950(yr = 1950, paris_pras = FALSE)integer by default 1950. One can choose the relevant year to consider for the PRA prices. For instance, we tried 1966 once.
Boolean by default FALSE indicating that we do not
want to keep parisian PRAs disaggregated in the data.
outputs to
data/statistique-agricole/petite-region-agricole/area-pop-prices-1950.csv