Sample Selection and Heckman's Method | Estimation Methods | Stata Tutorials Topic 46

Stata Tutorials Topic 46: Sample Selection and Heckman's Method | Regression Analysis and Estimation Methods Using Stata Hi, I am Bob. We will explore sample selection today. We will learn how to follow Heckman's two-step procedure in Stata to alleviate the endogenous sample selection bias. Sample selection bias happens when the estimation sample cannot represent the entire population we are interested in. A classic example in econometrics textbooks is the women's wage equation. Please download the dataset for this topic: https://drive.google.com/file/d/1ZJDM... #SampleSelection #heckman #twostep #SampleSelectionBias #endogenous #exogenous #Stata #RegressionAnalysisandEstimationMethods #tutorial The Stata commands in this video: *Open dataset use CPS91.dta, clear describe tabulate inlf *OLS regress lwage educ exper expersq black hispanic estimates store OLS *Heckman two-step procedure manually *Step1: Linear predictions from selection regression probit inlf educ exper expersq black hispanic nwifeinc kidlt6 predict inlfhat, xb generate lambdahat=normalden(inlfhat)/normal(inlfhat) *Step2: Include inverse Mills ratio in wage regression regress lwage educ exper expersq black hispanic lambdahat estimates store SSC1 esttab OLS SSC1, mtitles se star(* 0.1 * 0.05 ** 0.01) b(%7.3f) compress *The heckman command heckman lwage educ exper expersq black hispanic, select(inlf=educ exper expersq black hispanic nwifeinc kidlt6) twostep mills(lambhat) estimates store SSC2 esttab OLS SSC1 SSC2, mtitles se star(* 0.1 * 0.05 ** 0.01) b(%7.3f) compress summarize lambdahat lambhat *An equivalent method probit inlf educ exper expersq black hispanic nwifeinc kidlt6 predict inlfhat_pr, pr regress lwage educ exper expersq black hispanic inlfhat_pr estimates store SSC3 esttab OLS SSC1 SSC2 SSC3, mtitles se star(* 0.1 * 0.05 ** 0.01) b(%7.3f) compress 【Some Free Courses on My YouTube Channel】 Economics in Real Life:    • Economics in Real Life   Solutions to Introductory Econometrics A Modern Approach 7th Edition:    • Solutions to Introductory Econometrics A M...   Solutions to Microeconomics Theory and Applications with Calculus:    • Solutions to Microeconomics Theory and App...   Introductory Stata:    • Introductory Stata (2022)   Introductory Microeconomics:    • Introductory Microeconomics (2022)   Five Minute Econometrics:    • Five Minute Econometrics (Econometrics Tut...   Five Minute Stata:    • Stata Tutorials   【國語Mandarin】現實生活中的經濟學:    • 【Mandarin國語】現實生活中的經濟學   【粵語Cantonese】現實生活中的經濟學:    • 【Cantonese粵語】現實生活中的經濟學   【粵語Cantonese】微觀經濟學基礎:    • 粵語Cantonese微觀經濟學基礎2022   【國語Mandarin】五分鐘計量經濟學:    • 【Mandarin國語】五分鐘計量經濟學（計量經濟學輔導）   【粵語Cantonese】五分鐘計量經濟學:    • 【Cantonese粵語】五分鐘計量經濟學（計量經濟學輔導）   On the Road:    • On the Road   【Become a Supporter of the channel ($2.99) to get PDF transcripts for】 1. Solutions to Microeconomics Theory and Applications with Calculus 5th Edition, 2. Solutions to Introductory Econometrics A Modern Approach 7th Edition, 3. Introductory Stata (2022), 4. Introductory Microeconomics (2022), and 5. Introductory Stata: Summary Statistics and Data Management    / @bobwenecon   In addition to the videos on my YouTube channel, you can also learn Stata from my free Alison online courses. Introductory Stata: Summary Statistics and Data Management https://alison.com/course/introductor... Introductory Stata: Graphics and Data Visualization https://alison.com/course/introductor...