Población y Desarrollo: Los problemas en la declaración de la edad de la población adulta mayor en los censos. CEPAL, 2000

Several investigations have shown concern on the probably high proportion of people of an advanced age in several censuses. For this reason, the quality of census information is analyzed in relation to the declaration of age in older people and some evidence is presented about the existence of errors in it. For this eight countries in Latin America have been selected, those that are in different stages of their demographic transition. By comparing these structures by age of the population that is 50 and up (and from 70 and up), be it throughout time as in more developed countries, serious inconsistencies have been found, basically an exaggerated proportion of people in the ages in the upper supreme extreme. At the same time, a high correlation between these irregularities and the index of preference of digits calculated for the age Group of 52-82 years old. The analysis of the preference of digits shows an error in the declaration of age that affects most importantly elderly people, where the most common pattern is a preference for the digit 0 and also for 5 (although to a lesser extent).