stmixed

The stmixed package began as the accompanying Stata implementation for the methodology developed in:

Crowther MJ, Look MP, Riley RD. Multilevel mixed effects parametric survival models using adaptive Gauss-Hermite quadrature with application to recurrent events and individual participant data meta-analysis. Statistics in Medicine 2014;33(22):3844-3858.

stmixed has now grown (and in someways shrunk) to become a wrapper function for merlin, which gives it a lot more capabilities. The new developments in stmixed are now described in a recent Stata Journal paper:

Crowther MJ. Multilevel mixed effects parametric survival analysis: Estimation, simulation and application. Stata Journal 2019;19(4):931-949. (Pre-print: https://arxiv.org/abs/1709.06633)