[R-sig-ME] A GLMER Question

Jamie Dallas j@m|ed@||@@88 @end|ng |rom gm@||@com
Mon Dec 13 22:36:28 CET 2021

Hello All,
I am running a GLMER with Gamma distribution and identity link. I have to
add a small constant (1 or 0.001) to my outcome to be able to run my models.

I know in a linear regression with Normality assumption, this only effects
my intercept but my other coefficient estimates will stay the same.

However, in my GLMER models I am noticing the choice of constant effects
all my parameter estimates. I thought since I am using an identity link
this should not happen.

1- Is my understanding wrong?

2- Why are my parameter estimates changing in my Gamma distributed GLMER
with identity link models, depending on the choice of added constant to my

Thank you in advance!



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