Snap
3 articles
When the parallel-trends test fails on one lead, what's left?
Replicating Wang et al. (2026) TWFE-DiD on SNAP BBCE adoption from IPUMS ACS, with Goodman-Bacon decomposition and leave-one-out diagnostics.
The Food Desert Myth: Why Proximity Isn't Access
Analysis of 6,613 grocery stores reveals zero food deserts, yet SNAP participation varies 4.7x. Geographic access doesn't predict food insecurity.
The Retail Density Paradox: Why More Stores Mean Worse Data
A verification method for EBT acceptance across the roughly 28,800 California stores in the USDA list, where more retailers means messier, not better, data.