The Excel file "Data.xls" contains a first sheet with the description of each variable
and a second sheed with the data.
This file is used to estimated the cross-country ERPT 
with GRETL (an open-source statistical package) in a press-bouton approach.
The Stata Do-file entitled "MS19-348_Stata" calls the data saved 
in the file "MS19-348_Data" which is a Stata Dataset.
When called, MS19-348_Stata.do creates the Figure "MS19-348Fig1.pdf" 
and a table with the time varying estimation "TimeVarying.txt". 