Alexandre Gaillard

Working Papers

Consumption, Wealth, and Income Inequality: A Tale of Tails

with C. Hellwig, P. Wangner, and N. Werquin — October 2023

R&R — Quarterly Journal of Economics

Unemployment Insurance Generosity and Self-Employment

PDF SSRN Appendix

with S. Kankanamge — April 2025

R&R — American Economic Journal: Economic Policy

Inequality, Business Cycles, and Growth: A Unified Approach to Stabilization Policies Coming soon

with P. Wangner — December 2022

Wealth, Returns, and Taxation: A Tale of Two Dependencies Coming soon

PDF Appendix NBER Slides

with P. Wangner — November 2023

Published & Accepted

Trade, Value Added, and Productivity Linkages: A Quantitative Analysis

Journal Appendix

with F. de Soyres — American Economic Journal: Macroeconomics, January 2026

From Unemployment to Self-Employment: An Evaluation of the SEA Programs

Journal WP Appendix

with S. Kankanamge — Journal of Labor Economics, January 2026

Supply Disruptions and Fiscal Stimulus: Transmission through Global Value Chains

with F. De Soyres, A. M. Santacreu, D. Moore — AEA Papers and Proceedings, May 2024

Global Trade and GDP Comovement

with F. de Soyres — Journal of Economic Dynamics and Control, May 2022

Work in Progress

Extreme Poverty in Wealthy Nations: Evidence from France

with C. Bruneel Zupanc, C. Hellwig, P. Wangner, N. Werquin

The Savings Wedge

with W. Morrison and P. Wangner

Wealth Dynamics and Serial Business Ownership

with S. Kankanamge, O. Karabulut

Older Working Papers

Buying and Selling Business Assets

with S. Kankanamge — June 2020

Brown University

PhD

Advanced Macroeconomics 1st year PhD · Spring 2026

Dynamic optimization — Hamiltonian, Lagrangian, growth model
Dynamic programming — Bellman equation, HJB equation
Complete markets and their rejection in micro data
Incomplete markets — Yaari–Blanchard, Aiyagari model
Heterogeneous-agent models — misallocation, Krusell–Smith
Unemployment and job search in frictional labor markets

Topics in Macroeconomics 2nd year PhD · Spring 2026

Undergraduate

Intermediate Macroeconomics Spring 2024, 2025, 2026

Toulouse School of Economics

PhD

Quantitative Macroeconomics 2nd year PhD · Fall 2024, 2025

Modern quantitative techniques — discretization, Young method
Dynamic programming and endogenous grid method (EGM)
Aiyagari model and extensions — labor supply, heterogeneous returns
Firm dynamics models and misallocation

Inequality Explorer

GHWW · PSID Panel · United States

Initialising…

Latest Gini

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Top 10% share

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Top 1% share

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Pareto α (P90)

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Select a variable

Metric over time · all adjustment versions

Load data to begin

Percentile Profile

P10 · P25 · P50 · P75 · P90 · P99 — latest year

Pareto Tail (Hill α)

Estimated above P90 — all versions

Percentile Ladder

P10 · P25 · P50 · P75 · P90 · P99 over time

Pareto α over time

Hill estimator above P90 · lower α = heavier tail · all adjustment versions

P90/P50 & P90/P10

Percentile ratios over time

Gini & Top Shares

Gini (left axis) · top 10% & top 1% shares (right axis)

Mean & Median over time

Real 2023$ · solid = mean · dashed = median

X axis (sorting variable)

vs

Y axis

Scale:

Levels

Log

Stat:

Mean

Median

Fit:

Linear

Smooth

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Thin lines = individual years · dark red = pooled average · dashed blue = fit · dashed grey = 45° line

Cross-variable Summary

All variables · latest year · first selected adjustment · click row to explore

Variable	Mean	Median	Gini	Top 10%	Top 1%	Pareto α	P90/P50	P90/P10

Variable Codebook

Definitions of all variables used in the dashboard — derived from PSID microdata

Data: Panel Study of Income Dynamics (PSID), biennial waves 2005–2023. The PSID microdata have been cleaned and adjusted for misrepresentation and misreporting using: (i) adjustments to National Income and Product Accounts (NIPA) aggregates; (ii) reweighting to match the wealth distribution of the Survey of Consumer Finances (SCF); and (iii) reweighting to match the income distribution of IRS Statistics of Income records.

Reference: Gaillard, A., Wangner, P., Hellwig, C. & Werquin, N. (2023). "Consumption, wealth, and income inequality: A tale of tails." SSRN Working Paper 4636704.

Interface: This visualisation was built by Claude (Anthropic). At no point did the AI have access to household-level microdata — only the pre-computed aggregate statistics displayed here were provided as input. All data processing, cleaning, and estimation were performed entirely by the authors in R.

Wicca

My Dog, Wicca

Montaigu, Vendée

Montaigu, France

Iceland

Somewhere, Iceland

Some extra facts about myself. I am trying to play tennis and drums — below, a picture of my (expected) level.

Tennis / Drums