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...Facebook sampling methods some methodological proposals ester macri cristiano tessitore university of florence e mail estermacri gmail com istat it abstract during the last decade new social realities like networks urged research methodology to reconsider many techniques in order face reality as a consequence kind survey has been developed exploiting net s power and involving internet users one main challenges surveys is represented by procedure this needs be reconsidered avoid risk being biased lack scientific accountability our work will concentrate on among most famous first part paper provides review major available highlighting underlining their strengths weaknesses especially perspective afterwards illustrates proposal all can divided into two groups aimed at whole population known subpopulation opinion problematic issues concerns contact strategy that should adopted maximize response rate particular difficulty arises different strategies identified respondent contacted through a...