The thread https://news.ycombinator.com/item?id=31785199 Show HN: A central bank simulator game with a realistic economic model has attracted much interest.

This post is by a former University of Chicago macroeconomist and presents Matlab code for simulating the joint dynamics of interest rates, inflation, and unemployment. The author has other posts with Matlab code.

A macroeconomic model in Julia used by the New York Federal Reserve is at https://github.com/FRBNY-DSGE/DSGE.jl .