The multiple-nuclei model of city structure tends to be most applicable to larger, older cities with multiple centers of activity, such as Los Angeles or New York City. The model suggests that a city is made up of multiple centers, or "nodes," each with its own unique characteristics and functions that attract different types of land uses and people. These nodes often develop around transportation hubs, natural features, or cultural institutions, and they may compete or complement each other for resources and development. The multiple-nuclei model contrasts with the concentric zone model, which suggests that a city has a single central business district surrounded by concentric rings of different land uses and socio-economic classes.