The New Manager Bounce: Real Effect or Selection Bias?

There is a measurable improvement in results immediately after a managerial change, typically lasting a handful of matches. The interesting question is whether the new manager caused it, and the honest answer is mostly no.

Managers are sacked after bad runs, and bad runs are usually a mix of genuine problems and poor luck. Whatever part was luck was always going to correct itself, regardless of who was in charge. Statisticians call this regression to the mean, and it accounts for most of the apparent bounce.

There is a small genuine effect on top: players auditioning for a new boss run harder, and a fresh tactical setup takes opponents a couple of weeks to solve. But it is smaller than the narrative suggests and it fades quickly, so the market's tendency to overreact to a new appointment is itself the opportunity.

Key points

Most of the bounce is regression to the mean, not the manager
A small genuine effect exists and fades within a few matches
The market usually overreacts to the appointment
Opposing a heavily shortened price is often the better bet

Frequently asked

Is the new manager bounce real?

The results improvement is real; the causal explanation mostly is not. Teams are sacked at their unluckiest point, and luck corrects on its own.

How long does it last?

Any genuine effect typically fades within four to six matches, after which the underlying quality of the squad reasserts itself.

Should I bet on a team with a new manager?

Often the better bet is against the overreaction, especially if the price has shortened significantly on the news alone.

Put it to use

The New Manager Bounce: Real Effect or Selection Bias?

Key points

Frequently asked

Put it to use

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