avg function

Varying Life Annuities: Geometric Progression

Calculates the present value of a varying life annuity according to a geometric progression.

avg(
  x,
  h,
  n,
  k = 1,
  r,
  i = 0.04,
  data,
  prop = 1,
  assumption = "none",
  variation = "none",
  cap = 1
)

Arguments

• x: An integer. The age of the insuree.
• h: An integer. The deferral period.
• n: An integer. Number of years of coverage.
• k: An integer. Number of payments per year.
• r: The variation rate. A numeric type value.
• i: The interest rate. A numeric type value.
• data: A data.frame of the mortality table, with the first column being the age and the second one the probability of death.
• prop: A numeric value. It represents the proportion of the mortality table being used (between 0 and 1).
• assumption: A character string. The assumption used for fractional ages ("UDD" for uniform distribution of deaths, "constant" for constant force of mortality and "none" if there is no fractional coverage).
• variation: A character string. "inter" if the variation it's interannual or "intra" if it's intra-annual.
• cap: A numeric type value. The annualized value of the first payment.

Returns

Returns a numeric value (actuarial present value).

Examples

avg(33,0,5,1,0.8,0.04,CSO80MANB,1,"none","none",1)
avg(26,2,4,1,0.4,0.04,CSO80MANB,1,"none","none",1)
avg(20,2,2,2,0.15,0.04,CSO80MANB,1,"constant","inter",1)
avg(40,5,5,3,0.07,0.04,CSO80MANB,1,"constant","intra",1)
avg(27,0,15,4,0.06,0.04,CSO80MANB,1,"UDD","inter",1)
avg(34,7,12,6,0.03,0.04,CSO80MANB,1,"UDD","intra",1)

References

Chapter 5 of Actuarial Mathematics for Life Contingent Risks (2009) by Dickson, Hardy and Waters.