Research Statement

I use economic frameworks to study how individuals and firms respond to changing constraints — particularly in environmental and food domains — to inform more effective and equitable policy design. My work extensively leverages large-scale cellphone mobility data combined with structural demand estimation.

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Extensions & Tools
Interactive Research Tool
PFAS Exposure Risk Dashboard

Per- and polyfluoroalkyl substances (PFAS) — known as "forever chemicals" — are persistent synthetic compounds detected widely across the U.S. This dashboard translates PFAS exposure estimates across industrial, drinking water, recreational, and dietary pathways into ZIP-level risk scores, enabling community-level analysis to support targeted environmental health policies.

2,991+
Known contaminated
locations in the U.S.
2,593
Public water systems
tested (MI/NY/PA)
23M
Population served by
tested systems

Research

Environmental (Dis)amenities
Uncovering Disparities in Water-based Outdoor Recreation using Cellphone Mobility Data
With Fan, Ji, Zhang · Environmental Research Letters 19 (2024)
Published+
From 70M+ outdoor trips, communities of color, rural areas, and disadvantaged groups are significantly underrepresented in water-based recreation. Native Americans travel 3–5× longer distances.
Quantifying Recreational Benefits from Fish Consumption Advisories
With Ren, Zhang, Zheng, Zhang · Forthcoming, Land Economics
Forthcoming+
WTP to avoid advisory sites ~$72/quarter; $87 in summer. Full disclosure generates $3.4M in aggregated annual welfare benefits.
Estimating the Economic Cost of Floods: Urban Mobility and Rental Markets
With Seunghoon Lee, Siqi Zheng · R&R, Regional Science and Urban Economics
R&R+
On high-tide flood days, visits decrease 5%. Each additional HTF day/year reduces rents 0.25%. Lower-bound annual cost of Presidential Disaster Declaration floods: $4 billion.
When Nature Turns Hazy: How Wildfire Smoke Affects Outdoor Recreation
With Yau-Huo Shr and Wendong Zhang · R&R, JEEM
R&R+
Each additional smoke day reduces visits 13%+. Wildfire smoke caused $21B/year in lost U.S. recreational benefits. Visitors adapt through substitution but only partially offset losses.
I Love That Dirty Water? Value of Water Quality in Recreation Sites
With Christopher R. Knittel and Jing Li
Working Paper+
Using anonymized mobile device data on ~22 million residents visiting 30,000 water recreation sites (2018–2022), recreators are willing to pay $8.20/trip for a one-meter increase in Secchi depth. Improving all sites to the cleanest observed would yield ~$56.3B in annual benefits.
Planes Overhead: How Airplane Noise Impacts Home Values
With Allroggen, Hansman, Knittel, Li, Wang · NBER Working Paper
Working Paper+
A one-decibel increase in annual day-night sound levels reduces housing prices 0.6–1.0%. WTP for quiet is heterogeneous across income and race.
Unequal Waters: Socioeconomic Disparities in Recreational Benefits from Water Quality Improvements
With Fan, Ji, Zhang · Working Paper
Working Paper+
Demand-side factors explain 80–90% of SES welfare gap; geographic access 10–20%. We propose an equity-informed alternative to current Iowa lake restoration prioritization.
Food System
How Do Firms Respond to Political Tensions? Chinese Food Importers
With Haoran Li, Wendong Zhang · The World Economy 47(8), 2024
Published+
20% persistent decline in Norwegian fresh salmon imports. "Political hedging" effect: 20% reduction in max import share from any single country three years post-sanction.
Shrinkflation, Unit Price Disclosure, and Consumer Welfare: Canned Tuna
With Harris-Lagoudakis, Crespi · R&R, Food Policy
R&R+
Consumers in disclosure states 130% more responsive to unit prices. Nationwide disclosure raises consumer surplus $2.57M short-term, $5.82M long-term.
Who Goes to Farmers Markets? Food Desert Gaps, Structural Demand, and Policy Design
With Cristina Connolly and Sandro Steinbach
Working Paper+
~70% of food-desert visit gap is demand-side; ~20% supply. SNAP acceptance closes ~18%; evening hours ~33%; one new market per food-desert CBG ~58%. SNAP delivers highest return per public dollar.
Human Mobility Methodology
Harnessing Human Mobility Data for Applied Economic Research: Current Knowledge, Challenges, and Emerging Opportunities
With Connolly, Steinbach, Vo · Journal of Economic Surveys
Published+
Survey covering contributions of mobility data to travel behavior, labor markets, social interactions, and health outcomes. Addresses measurement errors, sampling biases, and privacy trade-offs.
Causal Recreation Demand Estimation with Cellphone Mobility Data: Evidence from 2021 Huntington Beach Oil Spill
With Nieyan Cheng · Forthcoming, Land Economics · 🏆 Gregory Chow Best Paper, CES 2025
Forthcoming+
$1.03M aggregate welfare loss; $83k/week losses persisted beyond closure. Integrates empirical Bayes into a two-step random coefficient logit model for low-visit sites.
Evaluating Precision, Privacy, and Representation with Cell Phone Data: Evidence from Cape Cod Beaches
With Connolly, Steinbach, Vo · Forthcoming, Land Economics
Forthcoming+
MWTP $8.92/visit under best practices. Differential privacy reduces MWTP by 65%; relaxed dwell time by 57%. Highlights privacy-accuracy trade-offs in non-market valuation.
The Impact of Texas Senate Bill 8 on Family Care Utilization: Evidence from Large-Scale Mobility Data
With Vo, Connolly, Ghosh, Steinbach · Under Review, BMJ Public Health
Under Review+
Using GPS mobility data from Texas family care clinics (2021–2022), SB 8 increased administrative demands on day-shift practitioners (+8.74 visits/month) while urban patients visited more but spent less time per visit. Rural and suburban patient visits stagnated, highlighting how restrictive abortion legislation disrupts healthcare access for underserved communities.

Academic Profile

Teaching Assistant · Iowa State University, 2016–2019
Principles of MicroeconomicsISU, 2016–19
Economics of DiscriminationISU, 2016–19
Intermediate Environmental and Resource EconomicsISU, 2018
Microeconomic Analysis IISU, 2019
Guest Lecturer
Principles of MicroeconomicsUConn, 2024
Energy EconomicsUConn, 2025
Certificate
TYRIT Teaching CertificateISU, 2020
National Science Foundation (SBIR/STTR)
Journal of Environmental Economics and Management
Journal of the Association of Environmental and Resource Economists
American Journal of Agricultural Economics
Land Economics
Economic Journal
Journal of Regional Science
Canadian Journal of Agricultural Economics
Climatic Change
International Review of Economics and Finance
President2018
Economics Graduate Student Association · Iowa State University
Coordinator2018
Graduate Student Seminar · Iowa State University
President2014
China Center for Human Capital & Labor Market Research

Contact

Available for Zoom or in-person meetings,
9am–8pm ET, Monday–Friday.