Some attribute Newark's downfall to its propensity for building large housing projects. Newark's housing had long been a matter of concern, as much of it was older. A 1944 city-commissioned study showed that 31 percent of all Newark dwelling units were below standards of health, and only 17 percent of Newark's units were owner-occupied. Vast sections of Newark consisted of wooden tenements, and at least 5,000 units failed to meet thresholds of being a decent place to live. Bad housing was the cause of demands that government intervene in the housing market to improve conditions.