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Projects

Software I've built and research I've published—mostly at the intersection of policy, economics, and AI.

Software

Research

The double distortion: Income-based traffic fines and labor supply

Working paper

Max Ghenis 2025

Agent-based simulation analyzing welfare effects of income-based vs flat traffic fines, showing labor supply distortions from implicit marginal tax rates.

The disutility of uncertainty

Working paper

Max Ghenis 2025

How uncertainty around marginal tax rates affects social welfare.

What Nut?

Working paper

Max Ghenis 2025

Monte Carlo analysis of life expectancy from nut consumption, with evidence-traced claims and hierarchical nutrient models.

What can LLMs tell us about the ETI?

Working paper

Max Ghenis & Jason DeBacker 2025

We investigate how large language models perceive and simulate behavioral responses to tax policy changes, with implications for using LLMs in policy analysis.

Can LLMs forecast human value evolution?

Working paper

Max Ghenis 2025

Testing whether language models can predict moral and value change trajectories using historical General Social Survey data as ground truth.

The Mind: LLM coordination

In progress

Max Ghenis 2025

Simulating The Mind card game with large language models to study emergent coordination without explicit communication.

Beer price controls at Yankee Stadium

Working paper

Max Ghenis 2024

An economic analysis of consumer welfare, revenue, and externalities from stadium beer pricing policies.

AI model policy impact forecasts: A narrative prompting approach

Working paper

Max Ghenis 2024

Examining the use of large language models for forecasting policy outcomes under different U.S. presidential administrations using narrative prompting techniques.

Enhancing survey microdata with administrative records

Published

Max Ghenis & Nikhil Woodruff National Tax Association Annual Meeting November 2024

A novel approach to microsimulation dataset construction that combines Current Population Survey data with IRS administrative records for improved tax-benefit modeling.

Farness: Forecasting as a harness for decision-making

Working paper

Max Ghenis 2024

A decision-making framework that reframes subjective questions into forecasting problems with explicit KPIs, confidence intervals, and calibration tracking. Includes a Python package and methodology for measuring framework effectiveness in LLMs.

Civic engagement

My recommendations for California elections, with detailed analysis of ballot measures and races.

PolicyEngine

As CEO of PolicyEngine, I contribute to numerous policy analyses. Visit the PolicyEngine Research page for our full portfolio of published work on tax and benefit policy.

UBI Center

I founded the UBI Center in 2019, an open-source think tank researching universal basic income and cash transfer policies. From 2019 to 2023, the team produced over 60 reports on UBI proposals, child allowances, and carbon dividends.