group(country)
E0
= income_gini_before_oecd_i/ income_gini_after_oecd_i
= income_gini_before_oecd_i- income_gini_after_oecd_i
mort_2-15
mort_16-35
mort_36-50
mort_51-65
mort_66-80
mort_81-95
mort_96-110
Time since last start
(periodyears-k1) cubed
(periodyears-k2) cubed
(periodyears-k3) cubed
Linear prediction