T
Trevor
Member
Hi, I am trying to understand the details of the group pricing formula in
Chapter 18, section 3.2 of the CMP:
RP = Z*A +(1-Z)*E
I know E is the standard book rate, Z is the credibility factor.
However I want to know exactly what is represented by “A”
My understanding is when we are pricing for a specific group, we use the past experience for that group, and then adjust the standard book rate to get a book rate for them specifically.
Now I have 2 interpretations of “A”:
The reason I am asking this is because I want to demonstrate in my solution, that I know what am I talking about; rather than just hitting points on the examiner report by luck/memory work.
Can anyone explain this to me?
Chapter 18, section 3.2 of the CMP:
RP = Z*A +(1-Z)*E
I know E is the standard book rate, Z is the credibility factor.
However I want to know exactly what is represented by “A”
My understanding is when we are pricing for a specific group, we use the past experience for that group, and then adjust the standard book rate to get a book rate for them specifically.
Now I have 2 interpretations of “A”:
- If E is a standard book rate. (ie: a mortality table rates for all ages), and then A should be the group rate (adjusted from standard rate).
This way the formula would work mathematically (imagine this as a vector calculation) : Z*table+(1-Z)*table.
“A” will incorporate adjustment for past and future experience.
Z will be how much do we want to rely our final premium on this past experience
In this case, “RP” will be resultant premium based on expected past and future experience.
Therefore, the overall group rate in this case is A, and RP represents the actual premium being charged
- “A” is some experience adjustment, not actually a rate
Putting in a weight Z helps to derive the group rate, RP.
Therefore the overall group rate is RP. “A” is just some number for adjustment.
In this case, I think the formula is rather unusual: Z*scalar number +(1-Z)*table
However, this approach sounds more intuitive: we incorporate past experience to the standard rate in order to derive an overall book rate.
The reason I am asking this is because I want to demonstrate in my solution, that I know what am I talking about; rather than just hitting points on the examiner report by luck/memory work.
Can anyone explain this to me?