How sure can we be about an estimate when the same firms are observed year after year? Using simulated data for 100 firms in Python, we compare several ways of measuring the margin of error and show that no margin of error can fix an estimate that is biased to begin with. It includes an interactive app that runs in your web browser.
Which factors truly drive economic growth, such as investment, education or trade? Using 73 countries over four decades, we average across every possible combination of factors instead of betting on a single model, while allowing growth itself to shape those factors. This R tutorial comes with an interactive app that runs in your web browser.
Do carbon emissions first fall, then rise and then fall again as countries get richer? With 12 possible control variables there are thousands of possible models, so we use two data-driven methods that weigh or select the controls and test them on simulated data where we know the right answer. This Stata tutorial comes with an interactive app that runs in your web browser.
When many factors could explain carbon emissions, which ones truly matter? Using simulated data for 120 fictional countries where the right answer is known, this R tutorial compares three methods for choosing which factors to keep and shows that factors flagged by all three are the safest bets. It comes with an interactive app that runs in your web browser.
How much of the higher pay of union workers comes from the union itself, and how much from who joins? This Python tutorial shows how fixed effects, which compare each worker only with the same worker over time, remove hidden differences and cut the apparent union pay gain from about 18 to 8 percent. It comes with an interactive app that runs in your web browser.
Build econometric understanding through this Python companion to Cameron’s Analysis of Economics Data. Seventeen chapters connect statistical foundations, regression, panel data, and causal inference with real-data notebooks that run in the browser. Visual summaries, slides, quizzes, videos, podcasts, and AI tutors provide varied ways to explore the concepts and reinforce practical skills.