Economics PhD Candidate

Sean
Callahan

Macroeconomist studying regional development, structural transformation, and how policy shapes economic change. Currently researching spatial Keynesian economics and demand spillovers at Colorado State University.

Sean Callahan
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Research Interests

Spatial Keynesian Economics

My primary research develops a spatial Keynesian framework examining how fiscal policy effects and demand spillovers propagate across regions. Using European NUTS2 regions during the Global Financial Crisis and Euro debt crisis, I explore how public sector shocks propagate across space and time to produce coordination failures that deepen economic contractions.

Structural Transformation & Development

I examine how economies' industrial composition evolves and what role policy plays in steering this change. My work bridges theoretical frameworks with empirical analysis to understand production linkages, institutional capacity, and the mechanisms of economic development in both advanced and emerging economies.

Green Transition Macroeconomics

Through demand-driven models and simulations, I explore how economies can navigate the energy transition while maintaining employment and growth. This research investigates the macroeconomic dynamics of capacity investment and the distributional implications of climate policy.

Methods & Tools

  • Spatial Econometrics
  • Panel Data Methods
  • Input-Output Analysis
  • Network Analysis

Software

  • R

Approaches

  • Keynesian
  • Structuralist
  • Institutional
  • Spatial Economics

Working Papers

Spatial Keynesianism: Demand Spillovers and Public Finance
Sean Callahan
Job Market Paper • 2025
A Theoretical Framework for Spatial Keynesianism
Sean Callahan
Working Paper • 2025
The Collapse of the Social Partnership and Structural Change in the Celtic Tiger
Sean Callahan
2024
Demand-driven Model of Energy Capacity Investment
Sean Callahan
2024

Teaching Experience

304
Intermediate Macroeconomics
Instructor of Record • Fall 2025

New Keynesian theory, economic fluctuations, inflation, and growth theory.

240
Environmental Economics
Instructor of Record • 2024-2025

Market failures, policy instruments, and sustainability economics.

204
Principles of Macroeconomics
Teaching Assistant • 2023-2024

Introductory macroeconomics with recitation sections and tutoring.

202
Principles of Microeconomics
Teaching Assistant • 2022-2023

Foundational microeconomic theory and applications.

Econometric Methods

Theoretical Frameworks

Data & Analysis

Get In Touch

Email

sean.callahan@colostate.edu

Office

Clark C309B
Department of Economics
Colorado State University

Location

Fort Collins, Colorado
United States