2007 Methods Lecture, Guido Imbens, "Instrumental Variables with Treatment Effect Heterogeneity..."

Whole-channel inclusion: NBER is an honest teaching channel (title sample + 3 transcripts read: All three transcripts show rigorous academic lectures/research presentations by economists teaching substantive methods and findings to scholarly audiences, consistent with the whole-channel verdict.); this title passed a strict title check (sonnet) after a labelling pass.