[avivo]

I thought the ethnic/income quota was very surprising and did some more research.

If others are curious, here is the Singapore "Housing and Development Board" website that spells out the details and through which you apply for a spot: http://www.hdb.gov.sg/fi10/fi10321p.nsf/w/BuyResaleFlatEthni...

"The Ethnic Integration Policy (EIP) was implemented to promote racial integration and harmony. The policy also aims to prevent the formation of racial enclaves by ensuring a balanced ethnic mix among the various ethnic communities living in public housing estates. [...] When the ethnic group proportion or SPR quota or both have reached the block/neighbourhood limit, a buyer will not be allowed to buy a flat as it will lead to an increase in that ethnic proportion or SPR quota or both."