Sampling from Gompertz Distribution with negative shape parameter.

Sampling from built in Gompertz distribution in TreeAge Pro 2016 - 2018 is restricted to positive rate and shape parameters.  It is possible to create a custom function that will obtain samples with negative shape parameter.

Please see the following article for details:

https://treeage.zendesk.com/hc/en-us/articles/360002682794