Map — Tax income per canton in Alsace — The interdecile ratio* per unit of consumption (UC) — 2011

Map of tax income by canton in Alsace: the interdecile ratio per unit of consumption (UC) in 2011. The classification used is natural thresholds (Jenks) in 5 classes. Tax income (source: http://www.insee.fr) is the sum of the resources reported by taxpayers on the tax return, first and foremost abatement. It does not correspond to disposable income. Tax income includes income from employment and self-employment, disability pensions and pensions (excluding minimum old age), maintenance payments received (deduction of pensions paid), certain income from assets and taxable social income: sickness and unemployment benefits (excluding RSA). Tax income is broken down into four main categories: \- wage income; the income of self-employed occupations (benefits); \- pensions, pensions and pensions; \- other income (mainly wealth income). Tax income is expressed according to three levels of observation: \- the unit of consumption; \- the household; \- the person. The interdecile ratio of tax income per unit of consumption establishes the ratio between the highest income per UC and the lowest income per UC, removing on each side the 10 % of people with the most extreme incomes. This indicator measures the relative disparity between the highest and lowest tax revenues, without being distorted by the most extreme incomes. It therefore allows to study the disparities in income per UC within an area, but also between zones. The consumption unit (UC) (source: http://www.insee.fr) is a weighting system that assigns a coefficient to each member of the household and makes it possible to compare the living standards of households of different sizes or compositions. With this weighting, the number of people is reduced to a number of consumption units (UCs). To compare the standard of living of households, one cannot stick to consumption per person. Indeed, the needs of a household do not increase in strict proportion to its size. When several people live together, it is not necessary to multiply all consumer goods (especially durable consumer goods) by the number of people to maintain the same standard of living. Thus, to compare the living standards of households of different size or composition, an income-adjusted measure per unit of consumption is used using an equivalence scale. The current most widely used scale (known as the OECD) has the following weighting: \- 1 UC for the first adult in the household; \- 0.5 UC for other persons 14 years of age or older; \- 0.3 UC for children under 14 years of age.