Interrupted Time Series (The Effect, Videos on Causality, Ep 49)

Please visit www.theeffectb... to read The Effect online for free, or find links to purchase a physical copy or ebook.
The Effect is a book about research design and causal inference. How can we use data to learn about the world? How can we answer questions about whether X causes Y even if we can't run a randomized experiment? The book covers these things and plenty more. These videos are meant to accompany the book, although they can also be viewed on their own.
This video relates to material found in Chapter 17 of the book.
A version of this video without background music can be found here: • Interrupted Time Serie...
One way to implement an event study is as an interrupted time series. In its simplest form, this just means fitting a linear time trend to either side of the event and seeing what changes at the time the event goes into effect!