The Lee-Carter model has become a benchmark in stochastic
mortality modeling. However, its forecasting performance can be
significantly improved upon by modern machine learning techniques.
We propose a convolutional neural network (NN) architecture for
mortality rate forecasting, empirically compare this model as well
as other NN models to the Lee-Carter model and find that lower
forecast errors are achievable for many countries in the Human
Mortality Database. We provide details on the errors and forecasts
of our model to make it more understandable and, thus, more
trustworthy. As NN by default only yield point estimates, previous
works applying them to mortality modeling have not investigated
prediction uncertainty. We address this gap in the literature by
implementing a bootstrapping-based technique and demonstrate that
it yields highly reliable prediction intervals for our NN
model.
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