China is so populous that their largest cities are running up against the current technological limits of housing density. Beijing is especially challenging - i

China is so populous that their largest cities are running up against the current technological limits of housing density. Beijing is especially challenging - it’s hard to build any more densely there without very careful planning; the city’s development could be warped by the Marchetti constant. North American cities are sparse and are nowhere near our tech limits. Housing shortages in North America are due to nothing more than bad regulation.