Similar instruments are used, for example, also in France and the United States (Scanlon and Kochlan, 2011). The ability of this instrument to increase supply of affordable rental housing needs to be better understood and assessed against their cost. In addition to public support towards the sector, the protection of tenancy and the rules for rent setting are crucial for enabling the delivery of affordable housing through the private rental sector. Among the 20 reporting countries that provided information, 14 report applying rent controls - mostly regulating rent increases.