pols_if_avg

pols_if_avg(i)

Average number of policies in-force in step i

For policies existing on date_(i+1), defined as the mean of pols_if_at(i, 'BEG_STEP') and pols_if_at(i+1, 'BEG_STEP').

For policies maturing during step i, defined as the mean of pols_if_at(i, 'BEG_STEP') and pols_if_at(i, 'DECR_LAST').