Repo

inflation is at 7%. you have one dial and it answers late.

turn the one dial a central bank has — and feel it answer six months after you asked

A central bank's one lever, the interest rate, doesn't touch the economy today. It moves through banks, loans, spending, then prices, a chain taking months, so the rate set now answers a problem from a while ago.

Concepts: feedback-loops, timing.

An interactive you play with one thumb, on Wundr.