d STB-55 sg142. Uniform layer effect models for the analysis of ... d Uniform layer effect models for the analysis of differences in d two-way associations. d STB insert by Maurizio Pisati, University of Trento, Italy d Support: maurizio.pisati@@galactica.it d After installation type, see help ^unidiff^ f sg142/example1.dta f sg142/example2.dta f sg142/unidiff.ado f sg142/unidiff.do f sg142/unidiff.hlp