Difference in differences - Wikipedia
![](https://upload.wikimedia.org/wikipedia/commons/thumb/d/da/Illustration_of_Difference_in_Differences.png/290px-Illustration_of_Difference_in_Differences.png)
![](https://www.researchgate.net/profile/Dariusz-Jemielniak/publication/349395964/figure/fig1/AS:992513678647298@1613645109548/Correlation-between-SJR-and-Wikipedia-citation-rate_Q320.jpg)
Journals' Wikipedia citation rank differences.
![](https://i.ytimg.com/vi/1lkYHGn9N0c/maxresdefault.jpg)
Heterogeneous difference in differences
![](https://www.econlib.org/wp-content/uploads/2016/09/problem.jpg)
Susan Athey on Machine Learning, Big Data, and Causation - Econlib
File:Bitmap VS SVG ru.svg - Wikipedia
![](https://bookdown.org/cuborican/RE_STAT/DIDregression.png)
Chapter 11 Difference in Differences
![](https://www.nray.dev/_astro/reference-and-test._uqn0fpi.png)
Visual Testing: Building A More Robust Wikipedia Interface By
![](https://kie.ue.poznan.pl/en/wp-content/uploads/2023/01/wikipedia_references_2022.jpg)
Important sources of information in different topics and language
![](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c7/Bias_described_using_LMM.jpg/235px-Bias_described_using_LMM.jpg)
Mixed model - Wikipedia
![](https://reagle.org/joseph/2006/disp/screen-shots/proposal-img2.png)
Proposal: In good faith: the collaborative culture of Wikipedia
![](https://theeffectbook.net/the-effect_files/figure-html/differenceindifferences-didsteps-1.png)
Chapter 18 - Difference-in-Differences
![](https://preview.redd.it/i-thought-i-should-get-my-eyes-checked-but-it-appears-that-v0-tl47o0io1yic1.png?auto=webp&s=4477bc7d8b9aa43ac48f2357aa32cb84d8132214)
I thought I should get my eyes checked. But it appears that is not
![](https://www.aptech.com/wp-content/uploads/2019/03/gblog-difference-in-differences-class-example-2.png)
Introduction to Difference-in-Differences Estimation
![](https://images.spiceworks.com/wp-content/uploads/2022/05/05041109/surface-web-vs-deep-web-vs-dark-web.png)
Dark Web vs. Deep Web: 5 Key Differences