Live now · New York City
NYC Transit Live
Track NYC subway trains, buses, LIRR, and Metro-North in real time. The map also shows arrivals and service alerts from MTA feeds.
Open the map
Projects
Selected projects
A few things I've made outside my research papers.
Courses & workshops
Notes in Modern Analysis
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.
Nowcasting with High-Frequency Data
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.
Time Series Models for Macroeconometric Analysis
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.