This indicator stems from a question included in the European Social Survey on human values in which respondents were offered the description of a hypothetical person for whom it is important to understand people different from him or her. The respondent must answer whether this hypothetical person is like him/her or not. The answer categories are the following: Not like me, Like me, and Neutral. Income level is presented in quintiles, being divided into five parts that are equal in percentage terms (which group together 20% of the income) giving rise to five quintiles. Thus, the first quintile includes citizens with the lowest incomes, and the fifth quintile those with the highest incomes. The education level is presented in three groups associated with ISCED codes: Low (ISCED 1 and 2), Middle (ISCED 3 and 4) and High (ISCED 5 or higher).