The aim of this paper is to explain how to apply for microdata provided by Eurostat.Comparative studies using microdata of official statistics contribute to understanding oursocieties. Official statistics as public goods are significant not only for decision-making andevaluation purposes, but also for scientific purposes through academic research. The applicationprocedure comprises two steps. The outcome of Step 1 is for a research organization to berecognized as a research entity. Important factors in Step 1 are the eligibility and responsibilitiesof the research entity ; the main purpose of an organization; providing evidence of researchpublication; independence and autonomy in formulating scientific conclusions ; and adequate datasecurity safeguards, including accessing confidential data only for the agreed-upon purposes andguaranteeing the physical security of the data. Once Eurostat have recognized the organization asa research entity, researchers can apply for access to microdata. Important factors to consider inStep 2 are the purpose of the research proposal ; safekeeping of the data ; and intermediate andfinal results for assuring anonymity of the respondents.