Sunday, 19 May 2013

Football model: Last predictions for 2012/13


Chelsea v Everton - Home win
Liverpool v QPR - Home win
Man City v Norwich - Home win
Newcastle v Arsenal - Away win
Southampton v Stoke - Draw
Swansea v Fulham - Home win
Spurs v Sunderland - Home win
West Brom v Man U - Away win
West Ham v Reading - Home win
Wigan v Villa - Ridiculously close! Home win

Tuesday, 14 May 2013

What's an analyst selling?

When we offer analysis in any field, what are we selling? I mean what do we really offer, right down at the core of it?

There isn't always an easy answer. A great story that makes this point is the one about the advertising consultant who was speaking to Parker pens and asked them what business they were in. What do Parker pens sell?

Pens, they said.

The consultant disagreed. He said Parker were in the gift business and that the gifts happened to be pens, and he was right. Nobody buys an expensive pen for themselves.




If you understand what you're selling, then you can sell it better. You can also future-proof yourself and not go the way of Kodak, who thought they were in the film business and not the 'taking photographs' business, so ignored digital cameras for a long time, despite having invented the first one in 1975. You go bankrupt by not understanding what you really sell.

So back to the original question. What do analysts offer?

Answers... Numbers... In advertising, I could tell you that spending a million pounds on TV will make you two million pounds in extra profit. In football, an analyst could tell you that signing the latest bright young thing from Italy should increase your points total for next season by ten.

That's the visible output from our work, but why does a decision maker want that information? In one word, what is the analyst selling?

Certainty.

In an uncertain world, we sell certainty. Confidence. The ability to know.

Since I've started analysing football, two themes keep bubbling up in conversations among football analysts on Twitter. One is a huge frustration that clubs appear not to be listening to the analytical community and what it thinks it can add to the game. The other is the large role that luck plays in winning football matches.

I think these two are related.

As analysts, we're hugely interested in chance because it sets the limits of what we can know for certain. In a football match, we obviously can't predict the bit of the result that is down to luck. If two teams are incredibly closely matched, who will win? It could come down to inches either way, on just one shot in the 90th minute, that strikes a post.

In a sales model, we often have measures which we're not statistically confident about. The model says that a marketing campaign is probably working and generating extra sales, but it isn't sure.

This is a problem, when what you're selling is certainty. Undermining the certainty that you sell is a Bad Thing.

What do we do? Do we make claims that aren't substantiated? Offer 100% certainty, even though we know it doesn't exist? Some people do. They quickly get found out as charlatans. Let's not do that.

What we can do is focus on what we know and move slowly onwards from there, because if you've done a big piece of work and you still don't know anything with more certainty than the person who commissioned it, then you've wasted your time. Start with the building blocks that you're confident in.

In marketing, analysis has a foothold because we can do this. We can walk into a business, run an analysis, offer some certainty about the world and critically offer a set of decisions that will improve the current situation. "Will improve" in analyst language means "will probably improve" but we tread a fine line.

In offering this certainty in an uncertain world, partly what we do is transfer risk from decision makers, onto ourselves. If you hedge your bets and prevaricate about what is the right decision, all of the uncertainty and all of the risk is still with the decision maker. They're paying you to make some of that risk go away.

I've yet to see very many of these types of conclusions in football analysis; concrete, positive strategies, based on statistics, that will help to win more games. Proving what doesn't work is easy.

We think that around 35% of match results may be down to luck.

We think that sacking your manager doesn't make any difference.

We believe that winning a cup trophy doesn't make you a better manager than the guy you beat in the final.

These are fascinating things and essential to understand, but it's positive conclusions that will make the difference in getting analysis adopted in any field. If you're a football manager, what's the knowledge above worth? A consolation prize as you sit at home, sacked, that you were just unlucky?


We sell certainty. And if we don't have any certainty to sell, we've got nothing.

Football model: Predictions for mid-week 14th May

Quick update with percentages for tonight. No alarms and no surprises, with wins for Arsenal and Man City, although we've got Man City as more likely to win than the bookies think (sacking effect?) and Arsenal as a little less likely.



Saturday, 11 May 2013

Football Sim: Predictions for 11/12 May

Nearly time for a summer of model development, but here are the predictions for this weekend...



Erm, Chelsea? Really?

Yes, really. This one's interesting.

Fantasy football scout has Chelsea starting with the this line-up:


Petr Cech
César Azpilicueta
David Luiz Moreira Marinho
John Terry
Ashley Cole
Oscar dos Santos Emboada Junior
Frank Lampard
Ramires Santos do Nascimento
Victor Moses
John Obi Mikel
Demba Ba

With last week's starting eleven for Chelsea, we'd have Villa: 34% Chelsea: 41% Draw: 24%. Either way I've got it closer than the bookies, but this is one of the good things about the flexibility of an agent based model. Mine still needs a hell of a lot of work, but it's why if I was a manager, I'd want a resource like this available to simulate games ahead of the event. How much squad rotation can you get away with and still be confident of winning?

For betting:

Villa v Chelsea - We'll see when the starting lineups are announced. Might tweet it. Might be out windsurfing (it's not like this is a proper job...)

Stoke v Spurs - Home win
Everton v West Ham - Home win
Fulham v Liverpool - Away win
Norwich v West Brom - Home win
QPR v Newcastle - Draw
Sunderland v Southampton - Draw
Man United v Swansea - Home win


Yes, I know Stoke's a bit, erm... controversial too. We got Swansea in mid-week at 4.75 though. It does happen.

Tuesday, 7 May 2013

Football Model: Midweek Predictions 7th May

The model's been very up and down the past couple of weeks and I'm not sure why and it also made some slightly strange calls for last weekend (although both QPR's draw and Swansea's win both nearly came off!)

I can't find a mistake, but that doesn't mean there isn't one... so I've rebuilt the database to be on the safe side.

Here are tonight's and tomorrow's efforts:


Straighforward betting... Man City, Swansea and Chelsea to win.

Proper round up of performance so far coming soon, when I get some time. We're close to break-even on betting now I think. I haven't backed it since the start of calling results on here so my bank balance doesn't quite give the full picture!

Saturday, 4 May 2013

Football model: Predictions for 4th May (Better late than never!)

Time for this weekend's predictions. Lots of new things going on with development of the next version of the model but I'll save that for later, here we go...



Swansea's percentages are a bit (only a bit?!) controversial, but it does do things like this now and again. Sometimes it's right! The cause seems to be that the model's pretty determined Swansea have got goals in them.


And for betting...


Fulham v Reading - Home win
Norwich City v Aston Villa - Away win
Swansea City v Manchester City - Home win
Tottenham Hotspur v Southampton - Home win
West Bromwich Albion v Wigan Athletic - Home win
West Ham United v Newcastle United - Home win
Queens Park Rangers v Arsenal - Draw
Liverpool v Everton - Home win
Manchester United v Chelsea - Home win
Sunderland v Stoke City - Draw


QPR to grab a draw? Hmmm... well we've come this far. There's a very small margin on this decision but no backing out now.

Friday, 26 April 2013

Football model: Predictions for 27 April

OK, so last week was a bit of a shambles. Three results out of ten and a loss at the bookies. Damn.

But that means we're due a win this week, right? I think that's how they said probability works at school.

Here are the predictions for this weekend - a little early because I'm off to drink a few cervezas in Madrid (and tour the Bernabeu! Brilliant!) Any late changes to the starting line-ups that are on Fantasy Football Scout, we'll just have to live with.



If you're betting (I still have faith...) then:


Manchester City v West Ham United - Home win
Everton v Fulham - Home win
Southampton v West Bromwich Albion - Away win
Stoke City v Norwich City - Home win
Wigan Athletic v Tottenham Hotspur - Away win
Newcastle United v Liverpool - Away win
Reading v Queens Park Rangers - Away win
Chelsea v Swansea City - Home win
Arsenal v Manchester United - Away win
Aston Villa v Sunderland - Draw