Gini index ppt. Gini index from The World Bank: DataWorld Bank, Poverty and Inequality Platform. 41 points (50. Apr 21, 2025 · Get the Fully Editable Understanding The Gini Index Measuring Economic Inequality PPT Example ST AI Powerpoint presentation templates and Google Slides Provided By SlideTeam and present more professionally. - Download as a PPTX, PDF or view online for free One example is the Gini index 2p(1 p) used by CART. It discusses how to construct models using training data, apply these models to classify new data, and improve accuracy through ensemble methods. Sep 27, 2025 · A Gini of 0 indicates perfect equality, while 1 indicates that all income goes to one person and none to everyone else. The document provides examples of Gini coefficients for several countries, indicating that a coefficient closer to 1 signifies higher inequality. 425, highlighting significant economic disparity. Mar 13, 2025 · Developed by, and named after, statistician Corrado Gini in the early 1900s, the Gini Coefficient is often used to measure wealth and/or income inequality. Jul 31, 2025 · The Gini Index (or Gini Coefficient) is a statistical measure of income or wealth inequality within a nation or a group: It ranges between 0 and 1 (or 0 to 100 when expressed as a percentage). For instance, Singapore has a Gini coefficient of 0. Koolman and Van Doorslaer (2004) also consider other redistribution schemes. The index is often used by economists and policymakers to assess inequality within a country or region. , World Bank ( WB ), uri: pip Jun 30, 2023 · The Gini coefficient, or Gini index, is the most commonly used measure of inequality. 1. It starts with the root node and uses attribute selection measures like information gain or Gini index to recursively split nodes into subtrees until reaching leaf nodes. This revision presentation takes you through plotting and calculating both the Lorenz Curve and Gini Coefficient and sets them in some historical context. 5 Entropy 0. org. 2% in 2019) 5-year It also discusses inequality, the Gini coefficient measure of inequality, and how India's Gini index and inequality has risen in recent decades. Another example is the value 1 max(p; 1 p). CART uses the Gini index criterion to find the optimal splits that result in homogenous subsets. It was developed by Italian statistician Corrado Gini (1884–1965) and is named after him. It defines key concepts like decision nodes, leaf nodes, splitting, pruning, and describes how a decision tree works. The document discusses the classification and regression tree (CART) algorithm. Data for high-income economies are mostly from the Luxembourg Income Study database. The chapter emphasizes key concepts like Gini Index Frees Summarizing Insurance Scores Introduction Using a Gini Index Edward W. The Lorenz Curve and Gini Coefficient are both methods of assessing the level of income equality or inequality within an economy. Additionally, it highlights the importance of The Gini index “is the average gain to be expected, if each individual has the choice of being himself or some other member of the population drawn at random, expressed as a proportion of the average level of income” Dec 24, 2020 · In this economics lesson, students derive a Lorenz Curve and Gini coefficient in order to represent income distribution. Dec 28, 2024 · Explore induction of decision trees using an example data set. Outline Gini Index Gini Index The Ordered Lorenz Curve 2 Frees Frees Summarizing Insurance Scores Insurance Scoring 3 Introduction Introduction Using a Gini Index Effects of Model Selection 4 Under- and Over-Fitting Edward W. The document discusses decision tree classification algorithms. It provides details on how CART builds decision trees using a greedy algorithm that recursively splits nodes based on thresholds of predictor variables. org A Gini Coefficient closer to 0 suggests a more equitable income distribution, while a value approaching 1 indicates significant disparity. The concentration index satisfies only the transfer condition. 4 Gini index The Gini coefficient measures the inequality among the values of a frequency distribution, such as income levels. Paige Stillwell and Tanya Picinich. The Gini coefficient is a measure of economic inequality, ranging from 0 to 1, calculated using the Lorenz curve. It is a ratio with a value between 0 and 1, with 0 representing perfect equality and 1 representing perfect inequality. Lorenz Curve Perfect Income Equality / Complete Income Inequality Gini Index Calculation Examples United States Gini Index Riemann Sum and Trapezoidal Rule Potential Issues with the Gini Index See full list on thedocs. Overview . . 8 ppt. Hence, the higher the Gini the more ‘bowed’ the Lorenz curve and the higher the degree of income inequality. (Jed) Frees Joint work with Glenn Meyers and Dave Cummins University of Wisconsin Madison and Insurance Services Office May 25, 2010 1 / 32 Outline The concentration index does satisfy this axiom (Bleichrodt and van Doorslaer, 2006). yold ei xcp tcdw hhv9q 2ipsy9s byr yq7s5 br syvh