This series of online lectures covers the most important causal research designs in economics and other social sciences. This is the second of five videos on Marginal Treatment Effects (MTE). The video covers Heckman's selection model and two-step procedure. The course is based on two textbooks: - Mostly Harmless Econometrics by Joshua Angrist and Steve Pischke (2009): https://press.princeton.edu/books/paperback/9780691120355/mostly-harmless-econometrics - Causal Inference -- the Mixtape by Scott Cunningham (2020): https://mixtape.scunning.com/ The slides for the course can be downloaded here: https://8650ac82-9ca9-4f0f-936f-a74ebd220904.filesusr.com/archives/6a2769_6040a3ea11fe4a79b4e0b7c795a00a2d.zip?dn=slides_elsner_causal_inference.zip Course outline: 1 Basics of causal inference (2 videos) 2 Instrumental variables (5 videos) 3 Marginal treatment effects (4 videos) 4 Regression discontinuity and kink designs (4 videos) 5 Difference-in-differences (5 videos) 6 Synthetic control (2 videos) Get in touch: - follow me on twitter: https://twitter.com/ben_elsner - website: https://www.benjaminelsner.com - profile on linkedin: https://www.linkedin.com/in/benjamin-elsner-b71b98bb