DiD Digest

A Field Guide to Missing Data (Part 2)

Continuing our exploration into what economists do when the data they need aren’t there.

Aug 24 • Beatriz Gietner

8

A Field Guide to Missing Data (Part 1)

What economists do when the data they need aren’t there.

Aug 17 • Beatriz Gietner

13

1

One number doing too much work

On distributional and mediation parameters in DiD

Aug 4 • Beatriz Gietner

10

3

March 2026

The estimate is in the design

On stacking, discrete outcomes, matched inference, and data-driven controls

Mar 30 • Beatriz Gietner

18

January 2026

The outcomes you measure and the assumptions holding them up

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

Jan 12 • Beatriz Gietner

8

3

1

November 2025

On Finding Causes vs. Finding Levers

What are you actually trying to say?

Nov 18, 2025 • Beatriz Gietner

21

6

5

Hidden Bias, Pie Charts and Spillovers

What to consider when reality has stopped cooperating

Nov 3, 2025 • Beatriz Gietner

4

October 2025

Missing and Messy

A DiD horror story?

Oct 8, 2025 • Beatriz Gietner

7

1

September 2025

Where Standard Assumptions Go To Die

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

Sep 22, 2025 • Beatriz Gietner

19

2

August 2025

Parallel Trends… Conditionally: Covariates, Violations, and More Robust DiD Methods

The devil in the ~DiD details~

Aug 11, 2025 • Beatriz Gietner

10

1

DiD+: how to handle data constraints, some timing issues and other TWFE limitations

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

Aug 1, 2025 • Beatriz Gietner

7

2

July 2025

Heterogeneity, Small Sample Inference, Anticipation, and Local Projections

On uniform confidence bands for conditional effects, a simple approach for small-N inference, refining the "no anticipation" assumption, and the LP-DiD…

Jul 22, 2025 • Beatriz Gietner

8

1