"global social housing movement, in which governments directly develop large-scale, mixed-income residential projects. In many European and East Asian countries, public development corporations have become significant real estate players. By developing large numbers of homes on public land, often in architecturally striking complexes closely linked to public transit, these agencies can shape the overall housing market and lower average prices. They can benefit from economies of scale and cross-subsidization, wherein the rents of higher-income tenants directly subsidize rents of their lower-income neighbors."

 https://www.fastcompany.com/91318915/this-parisian-neighborhood-could-be-a-blueprint-for-better-american-cities