Sebastian Olascoaga

City of Boston · MIT

Published Work

Topic
Method
Working paper · R&R AER
Flood-risk disclosure · field experiment 0% −8% −16% −12.4% Wk 0 Weeks since entering experiment Wk 9 Flood-risk score of searched homes High-risk baseline searchers, change vs control

Does showing buyers a home's flood risk change what they buy?

Press versionRedfin News, September 2022.

2024 · NBER w33119 · R&R, AER
Peer-reviewed paper
Flood-adjusted population projection · 30 years SSP2 baseline With flood risk 0% +14.02% +12.47% · Any RP +9.95% +8.55% · 20-yr RP +5.76% −1.42% 5-yr RP · −7.19pp Most frequent flooding produces the largest demographic swing

Blocks exposed to frequent flooding flip from +5.76% growth to −1.42% loss.

2023 · Nature Communications
Peer-reviewed paper
Eviction moratoria × COVID-19 hazard ratio HR = 1 (no effect) CCI 0 1.55 CCI 1 1.93 CCI 2 2.44 CCI ≥ 3 HR 2.36 0.5 1.0 2.0 3.0 Hazard ratio at week 12 with 95% CI · lifted vs maintained moratorium

When states ended their eviction bans, what happened to COVID-19?

2021 · JAMA Network Open
Peer-reviewed paper
Flood penalty by neighborhood trajectory · 8.1M home sales 0% −5% −10% −15% Flood −8.7% growing −15% shrinking, still falling −7y 0 +11y Prices recover where the population grows, and keep falling where it shrinks.

When a flood hits a shrinking neighborhood, home prices never recover.

2025 · Frontiers in Environmental Economics
Peer-reviewed paper
Severely food-insecure Mexicans · 2008 vs 2010 12% 8% 4% 0 8.9% 2008 9.8M people 10.8% 2010 12.2M people +2.4M in two years ~50M total food-insecure stayed flat; severity shifted downward

When Mexico's economy shrank, who went hungry first?

2015 · Public Health Nutrition
Doctoral thesis
Housing under shocks · PhD dissertation, three chapters $0 −$10k −$20k Tornado Chapter II · climate shock −$23,412 by year 8 · no recovery −5y 0 +9y

How does housing respond to climate and public-health shocks?

2023 · PhD - MIT
Master's thesis
Top 0.01% income share · 2011 · Mexico vs peers Mexico 3.00% United States 2.89% France 1.11% Spain 0.86%

How concentrated is wealth at the very top in Mexico?

2015 · MA · Paris School of Economics · advised by Alvaredo & Piketty

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