狠狠撸

causal inference political science diff-in-diff dd political methodology difference-in-difference did conjoint analysis コンジョイント分析 cjoint 政治的有効性感覚 无党派层 日韩比较 选挙公约 ???? 选挙公报 manifesto #???? #manifesto #选挙公报 #选挙公约 electoral system active learning role-playing 差分の差分法 rdd natural experiments regression discontinuity design directional model issue voting proximity model voting behavior observational studies retrospective intervention effects confounder selection