sentences:  According to Noah, adjusting for demographic factors such as increasing age and smaller households, indicates that income inequality is less extreme but growing faster than without the adjustment.The Gini coefficient was developed by Italian statistician and sociologist Corrado Gini and published in his 1912 paper "Variability and Mutability" ().Gini ratings can be used to compare inequality (by race, gender, employment) within and between jurisdictions, using a variety of income measures and data sources, with differing results.