cbgcnbd.LL: Calculate the log-likelihood of the CBG/CNBD-k model
Description
Calculate the log-likelihood of the CBG/CNBD-k model
Usage
cbgcnbd.LL(params, x, t.x, T.cal, litt)
Arguments
params
CBG/CNBD-k parameters - a vector with 'k', r, alpha, a
and b in that order.
x
frequency, i.e. number of re-purchases
t.x
recency, i.e. time elapsed from first purchase to last purchase
T.cal
total time of observation period
litt
sum of logarithmic interpurchase times
Value
a vector of log-likelihoods