[gus_massa]

> includes all babies born during the week of March 9, 1958 in Great Britain

> When the children were 7 and again when they were 11, their teachers were asked to describe them physically. For the purpose of the analysis below, the children are defined to be attractive if they were described as attractive at both age 7 and age 11.

> Sixty-two percent of the NCDS respondents are coded as attractive.

It is possible that teacher involuntary describe rich students as attractive and poor students as not attractive, or at least there is a bias. Or perhaps it's a bias for some race that is correlated with wealth that is correlated with intelligence. Malnutrition cause learning problems. Poor students get bad schools and not out of school tuition when necessary. It's not a 100% correlation, but perhaps enough to cause a difference in the study.