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Nick HK
@nickchk
Econ prof @SeattleU. Book The Effect theeffectbook.net out now! Check my pinned thread for all my projects. Substack nickchk.substack.com
nickchk.com
Joined October 2010
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  • Pinned
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    Nick HK
    @nickchk
    Jul 3, 2019
    This is a thread of me QTing myself so I can pin all my posted-on-Twitter projects. Causal inference animated graphs:
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    Nick HK
    @nickchk
    Nov 29, 2018
    As requested, slower graphs! Also added a graph on collider bias, the webpage explanation helps there. These graphs are intended to show what standard causal inference methods actually *do* to data, and how they work. This is what controlling for a binary variable looks like:
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    Nick HK
    @nickchk
    Nov 26, 2018
    I've been getting used to gganimate and thought it would be useful to put together some illustrations of what various causal inference methods *actually do to data* and how they work. Here, for example, is what it means to control for a (binary) variable
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    Nick HK
    @nickchk
    Mar 22, 2022
    In regression, there are several things that students are eternally concerned about but are actually Just Fine: 1. Your coefficients don't need to be significant 2. Your R^2 doesn't need to be huge 3. Your predictors can be correlated 4. Your variables don't need to be normal
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    Nick HK
    @nickchk
    Jun 16, 2020
    I feel like this is often not made clear enough in metrics
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    Nick HK
    @nickchk
    Mar 3, 2021
    My students have been having trouble figuring out how to put together a regression model - what to include, what to interact, which variables are left-hand/right hand. So I made a flowchart.
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  • user avatar
    Nick HK
    @nickchk
    Nov 29, 2018
    As requested, slower graphs! Also added a graph on collider bias, the webpage explanation helps there. These graphs are intended to show what standard causal inference methods actually *do* to data, and how they work. This is what controlling for a binary variable looks like:
    Image
    GIF
  • user avatar
    Nick HK
    @nickchk
    Nov 3, 2019
    A graphical explanation of why you shouldn't use R^2 to pick your model.
    Image
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    Nick HK
    @nickchk
    Dec 6, 2018
    Over winter break I'm planning to automate my CV, so I can just update a spreadsheet with accomplishments and it will spit out an updated website and PDF CV. Is this something anyone else would use or should I write it just for myself?
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    Nick HK
    @nickchk
    Jan 24, 2022
    Today I'm releasing the first video designed to accompany my book The Effect, about research design and causal inference. There are ~70 videos planned for the series. These can be used to accompany the book, as classroom material, or just on their own.
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    Nick HK
    @nickchk
    Apr 26, 2021
    Today I finally get to share the full draft of my new book The Effect. I think it turned out really well. The Effect offers a highly accessible and intuitive approach to research design and causal inference with observational data. Find it here: nickchk.com/causalitybook.…
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    Nick HK
    @nickchk
    Dec 21, 2021
    My causal inference book The Effect is finally out today! It's a super intuitive look at causal research design, casual diagrams, and standard research methods. I'm super excited, and jealous of everyone getting their copies today before I get mine!
    theeffectbook.net
    The Effect: An Introduction to Research Design and Causality | The Effect
    The Effect: An Introduction to Research Design and Causality | The Effect is a textbook that covers the basics and concepts of research design, especially as applied to causal inference from observ...
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    Nick HK
    @nickchk
    Apr 7, 2019
    I'm excited to show off something I've been working on for a few months now: the materials from a new class that I pinpoints a very different, and I think very promising way of teaching undergrad econometrics (thread)
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    Nick HK
    @nickchk
    Nov 1, 2021
    Last night my husband offered every trick or treater (old enough to handle it) a choice between a candy or a "mystery box". Every single child chose the mystery box. Trust levels high in my neighborhood.
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    Nick HK
    @nickchk
    Aug 2, 2020
    I've written an undergraduate-friendly guide to using simulations to do power analysis. It's in R but the concepts are general. Suppose I could do a Stata version too. nickch-k.github.io/EconometricsSl…