cooperation with institutions in other countries, so that knowledge can be gained of the manifestations, functions and mechanisms of these practices and the strategies designed to prevent, combat and eradicate them; Policies and practices Data collection and disaggregation, research and study 92. Urges States to collect, compile, analyse, disseminate and publish reliable statistical data at the national and local levels and undertake all other related measures which are necessary to assess regularly the situation of individuals and groups of individuals who are victims of racism, racial discrimination, xenophobia and related intolerance; (a) Such statistical data should be disaggregated in accordance with national legislation. Any such information shall, as appropriate, be collected with the explicit consent of the victims, based on their self-identification and in accordance with provisions on human rights and fundamental freedoms, such as data protection regulations and privacy guarantees. This information must not be misused; (b) The statistical data and information should be collected with the objective of monitoring the situation of marginalized groups, and the development and evaluation of legislation, policies, practices and other measures aimed at preventing and combating racism, racial discrimination, xenophobia and related intolerance, as well as for the purpose of determining whether 79