Free gretl for mac social advice

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Gretl 2022a Free

gretl is a cross-platform, free and open source software package for econometric analysis, written in the C programming language.
Gretl features :
- Easy, intuitive GUI
- Sophisticated (OLS, MLE, GMM, system estimation)
- Internationalized (10 languages besides English)
Requirements : GTK+ framework for Mac OS X 10.6.

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— Hello, I'm trying to evaluate a Diff-GMM and SYS-GMM using gretl. I'm confused about the SYS-GMM model, how it is used. selecting it has a note that it includes a level equation...

The SYS-GMM model in gretl includes a level equation, which means that it includes the original (undifferenced) variables. It does not refer to the first differences or their lags.