[statnet_help] Interpreting quadratic effects in ERGMs

[Gonzalez Loyola, M.A. via statnet_help]

Dear colleagues,

I am currently performing some ERGMs analyses, and in one of them I
explored the possibility of a quadratic effect, which was quite expected.
In the model I got a significant negative effect (Estimate= - 0.04,
p<0.01). I was wondering how to interpret the negative sign. My guess
(which would make sense with the data) is that the negative sign reflects a
negative concavity, meaning that the data resemble an inverted U shape. Has
any of you encountered that?
Any information on the interpretation of quadratic effects would be highly
appreciated.

Have a great week,

Melissa González
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