Basis over time — bps, positive = second venue richer
Distributionscentral 99% · each panel has its own bps axis
Event study — basis around a threshold crossing
bps · window ±s
Pick a pair and a threshold, then Run. Every crossing in the selected time
range is overlaid, aligned so t=0 is the crossing — the bold line is the
median path and the band is the 25–75% range, so you can see whether the basis
typically reverts or keeps going.