Well I'm going to match families on country of birth and residence, the demographics -- what sex, their age -- their income level within their own country, their educational achievement, a lot about their family structure.
コントロールできる特性は 生まれ育った国 性別や年齢などの属性 各国の基準で見た所得レベル 学歴や家族構成の詳細です