Читать книгу What Do We Know and What Should We Do About Social Mobility? - Lee Elliot Major - Страница 12

1. British official statistics since 2001 are based on the National Statistics Socio-Economic Classification (NS-SEC). At the top of the class hierarchy are the two levels of the managerial and professional salariat – Classes 1 and 2; and, at the bottom, are wage-workers routine jobs – Classes 6 and 7.

2. The distribution can be split into equal-sized groups of so-called quantiles, for example ten as deciles, five as quintiles, or the full set of 100 percentiles.

3. Galton uncovered the statistical phenomenon known as regression to the mean: the tendency of any measures to move closer to the average when they follow observations that are particularly high or low. The paper used many statistical terms still used by researchers to this day, namely correlations, standard deviations and percentiles.

4. A correlation of 1 would equate to complete immobility, with parents and offspring outcomes perfectly correlated. A correlation of 0 would signal no relationship. These are correlations and do not prove causality.

5. They titled their paper ‘Like Godfather, Like Son'.