[R-pkgs] New package feisr: Fixed effects individual slope models

Tobias Rüttenauer ruetten@uer @end|ng |rom @ow|@un|-k|@de
Fri Mar 22 12:41:30 CET 2019

Dear R users,

Are you worried about the parallel trends assumption in your panel
regression? Use fixed effects individual slope models, controlling for
heterogeneous trends!

I am very pleased to announce that the package feisr is now available on

CRAN: https://cran.r-project.org/package=feisr
GitHub: https://github.com/ruettenauer/feisr

The packages feisr provides a function to estimate fixed effects individual
slope (FEIS) models. FEIS models constitute a more general version of the
often used conventional fixed effects (FE) panel models. In contrast to
conventional fixed effects models, data are not person ‘demeaned’, but
'detrended’ by the predicted individual slope of each person or group, which
relaxes the assumptions of parallel trends between treated and untreated

We are happy about any comments or feedback!

Best regards,

Tobias Rüttenauer
Department of Social Sciences
TU Kaiserslautern
Erwin-Schroedinger-Str. 57
67663 Kaiserslautern

ruettenauer using sowi.uni-kl.de
Tel.: +49 631 205 5785

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