A program the carries out what is referred to in the paper as the 'basic simulation', followed
by estimation, is available to the readers of the journal. It is written in SAS (version 9.4) for Windows. 

In an early step of the program, coefficients in fertility and mortality equations are set. As explained
in the paper, they are set to the values estimated from real data, using similar models without
the random terms. These data cannot be made available to readers, for confidentially reasons, but many
readers probably have acceess to other data that they can use to estimate such models, or they may just choose
coefficients that seem reasonable without doing any estimation. As pointed out in the paper, the same bias 
appears across a wide range of assumptions about the coefficients. 

All simulations in the paper can be replicated with only small changes in the available program (such as setting 
certain variables to another value, including zero, or adding variables to the estimation command).