1609-91171609-9117S1609-9117202000020000910.15381/ripev.v31i2.17940ColombiaColombia000420200004202031220182644-5220021513-252000625-32200363387-93200181142-62016563361-6200819123-3020021536-5020066641-71996275-3031988219-311999501131-4520122265-752016561504-11198883201458201488-9620167150-6520164139-4520071339-47200433838-42Stata Software V 11.2 ®20182004549-552005648-512004873480-1