A city region is a metropolitan area and surrounding areas that function together economically. It typically includes multiple administrative districts but shares resources like a central business district, labor market, and transportation network. City regions are defined by dominant commuting patterns rather than arbitrary boundaries. Over time, city regions change shape as populations and economic activity shift. A city's influence decreases with distance from its center, but it exerts dominance over surrounding towns and cities through provision of specialized services. In India, city regions have formed around major cities through clusters of urban settlements in their areas of influence.