First pcm analysis commit

Scripts/Analysis/NoDIF/pcm_nodif_100.do

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+*=================================================================================================================================================
+* Date : 2024-01-23
+* Stata version : Stata 18 SE
+*
+* This program analyses simulated data without DIF through a partial credit model
+*
+* ado-files needed : - pcm (version 5.5 October 25, 2023, available on gitea)
+*
+  * outputs :  for N=100
+*
+*
+*================================================================================================================================================
+
+* Load pcm.ado
+adopath+"/home/corentin/Documents/These/Recherche/Simulations/Modules/"
+
+* Set output folder path
+local path_data = "/home/corentin/Documents/These/Recherche/Simulations/Data/NoDIF/N100"
+local path_res = "/home/corentin/Documents/These/Recherche/Simulations/Analysis/NoDIF/N100"
+local Nn = 100
+
+
+*==========================
+* Scenarios with : J=4
+*==========================
+
+** Scenario 1: J = 4 items / M = 2 modalities
+
+* Scenario 1A : H_0 is TRUE
+
+clear
+import delim "`path_data'/scenario_1A_100.csv", encoding(ISO-8859-2)  case(preserve) clear
+rename TT tt
+
+preserve
+keep if replication==1
+gsem (1.item1<-THETA@1)///
+     (1.item2<-THETA@1)///
+     (1.item3<-THETA@1)///
+     (1.item4<-THETA@1)///
+     (THETA<-tt), mlogit tol(0.01) iterate(500) latent(THETA) nocapslatent
+
+pcm item1 item2 item3 item4, categorical(tt)