Bia

@beatrizgietner.bsky.social

PhD candidate in Econ at UCDublin. Progress, Education, and Human Capital. https://beagietner.github.io/webpage/ Just work-related stuff here, check my Twitter/X for a personality

We have a new post :) Ever wondered what happens when your DiD sample composition shifts over time? Or what “parallel trends” means when outcomes are rounded into intervals? Or whether your pre-trend test is actually testing what you think it is? www.diddigest.xyz/p/the-outcom...

The outcomes you measure and the assumptions holding them up

New papers on compositional shifts, coarsened outcomes, pre-trend testing and event-study identification

diddigest.xyz

We have a new post!📬 ⭐️Factorial DiD (Xu, Zhao & Ding) ⭐️DiD With No Untreated Units (de Chaisemartin et al.) ⭐️Treatment Effects in Complex Designs (de Chaisemartin & D’Haultfœuille) ⭐️Inference With Few Treated Units (Alvarez, Ferman & Wüthrich) diddigest.substack.com/p/where-stan...

Where Standard Assumptions Go To Die

Universal treatments without clean controls, continuous policies without untreated groups, reversible reforms over time and statistical inference with handful of cases

diddigest.substack.com

Why Does Value-Added Work? Implications of a Dynamic Model of Student Achievement www.nber.org/papers/w34119 "Although conventional value-added estimates are biased for individual teachers due to attenuation, we find they are forecast unbiased when applied across a sample of teachers"

Why Does Value-Added Work? Implications of a Dynamic Model of Student Achievement

Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, an...

nber.org

Data come in many different formats and are used in many different ways, but in many cases, a checklist like this (along with good data documentation) can help you verify if a dataset is in a usable format for most general purposes. osf.io/t8upr

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My Retrospective on Wokeness in detail! Blogs are for just saying stuff, after all. So here is my attempt to say what was distinctive (if anything) about a recent era of socio-cultural life, what (if anything) changed, and what (if anything) was to the good sootyempiric.blogspot.com/2025/08/woke...

Wokeness: a Retrospective

In recent times my online sphere has had a fair few people make the claim that, in some sense, the culture has moved on from Woke. The d...

sootyempiric.blogspot.com

We have a new post! 🫶 Covering: ➡️UN-DID (for unpoolable data) ➡️Staggered DiD with misclassification (for handling timing issues) ➡️Interactive/Grouped FE Guide (broader panel data, not specifically DiD but related) + 3 applied papers :) diddigest.substack.com/p/did-handli...

DiD+: Handling Data Constraints, Timing Issues and TWFE Limitations

What to do when data can't be pooled, timing gets messy, and TWFE isn't enough

diddigest.substack.com