Nevertheless, a more elaborate appreciation of equality, like that proposed here, does require a broader range of indicators. One property of these indices is scale invariance, which means that if all incomes are multiplied by a certain number (which is equivalent to their increasing proportionally at the same rate), the indicator does not change. To illustrate absolute inequality, it is necessary to analyse absolute differentials between income strata or calculate what is known as the absolute Gini index, given by the product of the Gini index and the mean income in the distribution. In this case, the property of scale invariance is not present, but that of shift invariance is, meaning that if the same monetary amount is added to each household, the index does not change.