Economics & Mathematics — Columbia University

I study how people and institutions shape the economy.

Now New working-paper version of “When the Message Meets the Moment”: the state dependence of monetary surprises across model, market, and survey measures of expected inflation.

tyler.sotomayor@columbia.edu GitHub

Selected research All research →
01

Tipping the Tax: How Government Surcharges Become Gratuities

with Gabriel Uceda-Sosa

Suggested-tip screens compute percentages of the fee-inclusive total, so eleven cents of every legislated surcharge dollar on New York taxi meters becomes tip.

Working paper PREDOC Summer Research Conference, Chicago Booth (Jul 2026)

News
Oct 2025

Presented “When the Message Meets the Moment” at the Columbia Undergraduate Research Symposium.

Aug 2025

Presented at the World Bank PREDOC Summer Research Conference, Washington, D.C.

Spring 2025

Columbia University delegation, Pre-doctoral Economics Conference, Princeton University.

Spring 2024 & 2025

Peer Review Board member & discussant, Economic Scholars Program, Federal Reserve Bank of Cleveland.

Projects All projects →
Live

Notes in Modern Analysis

MATH S4061 · Columbia University

Course-note compilation for Columbia's summer real analysis course — nine chapters of lecture notes, problem sets with worked solutions, and a curated bibliography, tracking Rudin's Principles of Mathematical Analysis.

Live

Nowcasting with High-Frequency Data

Workshop · Columbia University

A workshop for students who want to work on forecasting and nowcasting. Eight sessions, each pairing one method with the code that runs it on real data, from the Kalman filter to a live GDP dashboard — with notes, slides, browser-based explorables, five practica, and a capstone scored against the Fed's own nowcasts.

Live

Time Series Models for Macroeconometric Analysis

Course notes · Barcelona School of Economics · 2024

My notes and MATLAB replications from BSE's macroeconometrics course, with worked exercises for all ten sessions. The material covers VARs, local projections, nonlinear models, and factor methods.

The Ledger All entries →