pols_if_at¶

pols_if_at(t, timing)[source]¶

Number of policies in-force

pols_if_at(t, timing) calculates the number of policies in-force at time t. The second parameter timing takes a string value to indicate the timing of in-force, which is either "BEF_MAT", "BEF_NB" or "BEF_DECR".

BEF_MAT

The number of policies in-force before maturity after lapse and death. At time 0, the value is read from pols_if_init(). For time > 0, defined as:

pols_if_at(t-1, "BEF_DECR") - pols_lapse(t-1) - pols_death(t-1)

BEF_NB

The number of policies in-force before new business after maturity. Defined as:

pols_if_at(t, "BEF_MAT") - pols_maturity(t)

BEF_DECR

The number of policies in-force before lapse and death after new business. Defined as:

pols_if_at(t, "BEF_NB") + pols_new_biz(t)