G
George88
Member
Hi,
I am really confused about what lift curves and gains curves are actually telling me.
On page 40 of the notes it says that the lines on the graph are actual claims frequency but arent they modelled frequency? On the previous page it says that a modle 1 is more predictive of the 2 because it is steeper? coudnt it be less predictive if it is overstating the relative frequency between the bands of exposure?
The gains curve is to compare observe to fitted values, but Gini coefficient is derived by comparing cumulative values to and the stright diagonal line, without giving regard to the cumultive distribution. Both seem to be showing the relative frequency of the or shape of cdf, as opposed to predictiveness of the model.
Please help
Thanks
I am really confused about what lift curves and gains curves are actually telling me.
On page 40 of the notes it says that the lines on the graph are actual claims frequency but arent they modelled frequency? On the previous page it says that a modle 1 is more predictive of the 2 because it is steeper? coudnt it be less predictive if it is overstating the relative frequency between the bands of exposure?
The gains curve is to compare observe to fitted values, but Gini coefficient is derived by comparing cumulative values to and the stright diagonal line, without giving regard to the cumultive distribution. Both seem to be showing the relative frequency of the or shape of cdf, as opposed to predictiveness of the model.
Please help
Thanks