Furthermore, taxation of residential, rental and social rental housing is excluded from this analysis because of limitations in the reported data.9 Overall, more work is needed to improve coverage and validate the quality of the data. The next sections provide more information on these policy instruments, on their coherence with social policy objectives and on the amount of resources invested in them. Owner-occupied housing is the dominant tenure across OECD countries (see Figure 1) and it received public support in all of the countries surveyed in OECD QuASH. The collected data show that multiple policy instruments are typically used to this end and generally include both demand-side and supply-side subsidies.