Bandingkan kaedah

	Kesan Rawatan Heterogen (CATE / Meta-Learner)	Pemboleh Ubah Instrumental melalui Kuasa Dua Terkecil Dua Peringkat (IV/2SLS)
Bidang	Inferens Kausal	Inferens Kausal
Keluarga	Regression model	Regression model
Tahun asal	2018	2009
Pengasas	Wager & Athey (causal forest); Künzel et al. (meta-learners)	Angrist & Pischke (textbook treatment); Stock & Yogo (weak-instrument theory)
Jenis	Causal machine-learning framework	Instrumental-variables regression
Sumber perintis	Wager, S. & Athey, S. (2018). Estimation and Inference of Heterogeneous Treatment Effects using Random Forests. Journal of the American Statistical Association.	Angrist, J. D. & Pischke, J. S. (2009). Mostly Harmless Econometrics: An Empiricist's Companion. Princeton University Press. ISBN: 978-0691120355
Alias	conditional average treatment effect, CATE, meta-learners, causal forest	instrumental variables, IV estimation, 2SLS, instrumental variable regression
Berkaitan	5	5
Ringkasan	Heterogeneous Treatment Effects is a machine-learning framework that estimates how a treatment effect varies across individuals — the conditional average treatment effect (CATE). It bundles meta-learner strategies such as the T-Learner, S-Learner, X-Learner and R-Learner alongside the causal forest of Wager and Athey (2018) and Künzel et al. (2019).	IV/2SLS is a two-stage estimation method that recovers the causal effect of an endogenous regressor by isolating the part of its variation driven by an external instrument. It is the workhorse identification strategy in modern applied econometrics, developed at length in Angrist and Pischke's Mostly Harmless Econometrics (2009).