Benktander: Benktander Reserving method
In ArnaudBu/ReservingLad: Reserving for Non Life Insurance

Description Usage Arguments Details Value Examples

Benktander applies the Benktander method to a cumulated claim triangle, as described in this paper: https://www.casact.org/library/astin/vol30no2/333.pdf.

1	Benktander(triangle, ultimateClaims, weight = NA)

`triangle`	Cumulated triangle as a matrix.
`ultimateClaims`	Ultimate claims by accident year.
`weight`	Boolean matrix the same size of the triangle to tell if the value is to be considered: 1 for yes, 0 for no. First column is not considered

Missing values are handled. There just need to be replaced by a NA.

It is possible to have more than one complete line.

A list containing the following objects:

triangle: the input triangle
developedTriangle: the developed triangle
gammas: the Benktander coefficients
ibnrByAccidentYear: ibnr reserve by accident year
ibnr: total ibnr reserve

1 2	ultimateClaims <- c(3901463,5433719,5378826,5297906,4858200,5111171,5660771,6784799,5642266,4969825) outputBT <- Benktander(triangleExampleEngland, ultimateClaims)