directly from capitalism. In terms of public opinion, nine out of ten people in a Swedish survey considered it correct that they are living in a class society. Comparative sociological research One may use comparative methods to study class societies, using, for example, comparison of Gini coefficients, de facto educational opportunities, unemployment, and culture. Effect on the population Societies with large class differences have a greater proportion of people who suffer from mental health issues such as anxiety and depression symptoms. A series of scientific studies have demonstrated this relationship. Statistics support this assertion and results are found in life expectancy and overall health; for example, in the case of high differences in life expectancy between two Stockholm suburbs. The differences between life expectancy of the poor and less-well-educated inhabitants who live in proximity to the station , and the highly educated and more affluent inhabitants living near Danderyd differ by 18 years. Similar data about New York is also available for life expectancy, average income per capita, income distribution, median income mobility for people who grew up poor, share with a bachelor's degree or higher. In class societies, the lower classes systematically receive lower-quality education and care. There are more explicit effects where those within the higher class actively demonize parts of the lower-class population. Theoretical models Definitions of social classes reflect a number of sociological perspectives, informed by anthropology, economics, psychology and sociology. The major perspectives historically have been Marxism and structural functionalism. The common stratum model of class divides society into a simple hierarchy of working class, middle class and upper class. Within academia, two broad schools of definitions emerge: those aligned with 20th-century sociological stratum models of class society and those aligned with the 19th-century historical materialist economic models of the Marxists and anarchists. Another distinction can be drawn between analytical concepts of social class, such as the Marxist and Weberian traditions, as well as the more empirical traditions such as socioeconomic status approach, which notes the correlation of income, education and wealth with social outcomes without necessarily implying a particular theory of social structure. Marxist For Marx, class is a combination of objective and subjective factors. Objectively, a class shares a common relationship to the means of production. The class society itself is understood as the aggregated phenomenon to the "interlinked movement", which generates the quasi-objective concept of capital. Subjectively, the members will necessarily have