
You’re in a game. There are three doors. Behind one is $100,000, the other two have nothing. You make a choice, and then the game-master opens one of the other doors, shows that it is empty, and gives you the opportunity to change your choice of door. Should you? The answer is yes. The unopened door not chosen by you has a two-thirds chance of having the prize behind it.
This conundrum, known as the “Monty Hall problem”, trips up a lot of people, who miss the basic asymmetry involved in the game*. There is a lot of this about, no less in the twitchy watching of Greens polling numbers in Oz politics. In 2007 the Greens polled 7%. In 2010 they polled 11%. In the last couple of years they dipped to 7% again.
Now, after the Papua New Guinea deal, their numbers may be shooting up again, especially as the deal turns out to be a messy disaster in the making. Every dip and rise is taken as some existential disaster or triumph — usually the former, with the Greens allegedly about to wink out of existence altogether.
Doubtless the Greens would prefer to be on 11% than 7%, but the fluctuations would only be a disaster if they were competing with nine other parties who were all around the 10% mark — that is, if there was parity. But with three asymmetrical parties it becomes a little more complicated.
If we look at the usual ALP primary and the Greens primary as one unit — say 40% and 10% respectively of the total vote as a simple baseline — when there’s some inner-city elites chai-and-sodomy gathering of 50 people debating who to vote for, that is two of those 50 switching back and forth, from one election to the next. Crunched down into the sort of units where political debate and discussion happens — neighbourhoods, workplaces, schools, friendship networks, etc — the asymmetric effect on the two parties can be seen.
So when that magic three- to four-point swing goes from three Greens to Labor it looks like a disaster for the Greens and a relatively small gain for Labor; when it goes the other way it looks like a relatively small loss from Labor, compared with some triumphal return to the Greens. But in both cases it’s the same thing — an English teacher in Bendigo and her aromatherapist partner have got the hump with either Rudd or Milne, or switched on the accession of Gillard/retirement of Bob Brown, as the case may be — the pattern has been repeated across the country, and the poll numbers have shifted.
“Thus the polling fictions continue, and no one really wants to look behind the green door, so to speak.”
That of course relies on one, I think reasonable, supposition: the Greens are a class party, with a small but solid class base who put a floor under any fluctuations. That makes them unlike their predecessors the Democrats, a coalition of diverse political forces, who were thus exposed to the horror of going out backwards and polling an asterisk. If there were any chance that the ALP could recapture the Green core, it disappeared last week.
That asymmetry doubtless creates some nerve-shattering lurches, for the Greens, but it’s arguable that they are better placed than the ALP to withstand it for two reasons — first, the volume of the vote means that there’s more capacity to round it up by doorknocking and personal contact (that’s if they do pound the pavement, at which they are sometime remiss). The ALP with plummetting numbers is bailing out a very leaky boat, with a pretty leaky bucket.
The second reason is, as I noted yesterday, that Labor has so deconstructed its own class base and broad class coalition that it has now set itself an extra task, which the other parties are not subject to — US-style, it must now round up a whole sub-section of its class base it could hitherto have regarded as assured. That must be done in the face of a virulently hostile media oligarchy in News Crop. It’s a measure of how residually shifted towards Labor Australia is that anyone votes for it at all.
How come this political process between Labor and Greens so rarely gets a sober assessment? The lack of a genuine class analysis of politics among the shrunken mainstream commentarati is one; another is their concomitant desire that the Greens would disappear so they could focus on stories about who’s up who in 19 different factions in a two-horse race.
But so too a lot of journalists have simply internalised the hatred directed towards cultural and knowledge workers characteristic of the new right-wing anti-“elitist” populism, deployed by pundits in thrall to the Murdochs, Packers, Palmers, etc. Even though their workaday trade remains shuffling words around on a screen, they can’t quite regard this vital sector of society and economy as “real” or of “equal citizenship”.
It’s the latest version of the pervasive myth of the Bush, as formulated in the 1880s, when Australia began its journey to being one of the most urbansied countries in the world. Despite the evidence of our eyes, and our daily lives, a lot of people still have some 1970s beer ad running in their head with blokes throwing fleeces, blowing up shit, etc, etc.
The reality — that we are a giant quarry with a small workforce surrounded by a vast mesh of suburbs and coffee shops — is rather less palatable, less of a myth to live off. Thus the polling fictions continue, and no one really wants to look behind the green door, so to speak.
*Essentially the game-master is choosing between the two doors that you haven’t chosen — because if he or she opened your door the game would already be over. And the game-master isn’t going to open a door that has the prize behind it, because then the game would be over. So the two doors you haven’t chosen are essentially one unit, with a two-thirds probability of having the prize in it. By switching your choice to the unopened door that isn’t yours, you are choosing the two-thirds unit, there thus being a two-thirds chance of the prize being there. Over an extended series of rounds it’s rational to switch even if a penalty fine of 49.999…% is levied on a prize resulting from a switched choice.

24 thoughts on “Choosing the Greens behind door number two”
Simon Mansfield
July 25, 2013 at 10:11 pmWaterfront Greens
Stephen Luntz
July 25, 2013 at 10:37 pm“90+% of the Australian voting public see the Greens as an extreme, ‘watermelon’ party, and wouldn’t vote for them in a fit.” At the last election 13% of the voting public voted for the Greens in the Senate. Presumably there was a share who didn’t vote Green but thought about it, so that 90+% figure is demonstrably wrong.
Guy raises the question of how large the core Green vote has now become, that is the floor for future Green results. CML thinks he knows the ceiling, but has it wrong. Both strike me as interesting questions.
Many like to claim there is a ceiling on the Green vote, which is usually just a little higher than the highest vote we’ve ever got. In the ACT at the last election the Greens Senate vote was 23%, because there were circumstances that peeled off some of those people who normally vote Labor, but have some sympathy for the Greens. The natural Green vote in the ACT is higher than the national average, but this certainly suggests the pool who might vote Green some of the time is at least 18%, which might rather shake things up.
The floor is even harder to estimate. If Rudd hadn’t decided to move Labor to the right could we have gone any lower than 7%? Hard to know, but state results suggest probably not.
Graham R
July 25, 2013 at 11:03 pmBeat me to it, Paddy. Hyuk.
CarlitosM
July 25, 2013 at 11:47 pmMardon & Sean: the Greens certainly have a class base, just not the one you are assuming!
To get a different perspective on the same thing Guy keeps on trying to illustrate, I suggest you go hunting for an illuminanting read: “Post Capitalist Society” by the “Father of Management” and Ronald Reagan Presidential medal awarded Peter Drucker (hint: he was NOT a lefty! )
CML
July 26, 2013 at 1:27 amCarlitosM @ #4. What I wrote in my previous post has nothing to do with “the political process between Labor and the Greens”. I don’t consider the Greens important enough for that. They have captured the inner city latte set and their ilk, to which they are welcome. Pack of twits who wouldn’t recognise reality if it bit them in the b+m! I get a bit narky when people start comparing these two political parties: Labor has been around for 120+ years, done lots of progressive things and is proving at present, as throughout its history, that it can change to meet the needs of the country. The Greens are about 20 years old, rigid, uncompromising, confusing and showing the behaviour of 2 year olds. I want what I want, when I want it!!
If they are to survive, they need to learn that politics is the art of the possible. No one in a democracy gets everything they want 100% of the time, nor should they. I think it was Ben Chifley who said something like: “Always listen to the other man’s point of view. You may be 90% right, but he might have the other 10% to complete the puzzle”. Unless and until, the Greens learn this, they are going nowhere in the future.
And you sir/madam are just another unintelligent intellectual prattling on about Peter Drucker and Ronald Reagan????? Give me a break!
Liamj
July 26, 2013 at 12:30 pm@ CML – In my electorate of Indi (north central Vic) Greens got 9.5% in 2010, not that many of your ‘innercity latte set’ here. But do keep your super-original analysis coming, saves me reading News Corpse.
Xoanon
July 26, 2013 at 3:07 pm“They have captured the inner city latte set and their ilk, to which they are welcome.” This is the perplexing attitude which has driven these voters to the Greens CML – sometimes Labor says it wants them on its side, sometimes it tells them to go to buggery. Which is it?
IMO Labor should stop seeing the Greens as its enemy and realise that the price of its movement to the middle ground is the loss of some of its voting base. Then after that realisation, start cooperating with the Greens to form governments where necessary, and to pass legislation of mutual interest.
JohnB
July 26, 2013 at 3:36 pmI am far from viewing the Greens as a middle ground party. Any party that can stomach Lee Rhiannon as a representative will have to do without my vote.
Formerly, it was tempting to consider Greens as an alternative to more of the same, but they have demonstrated by appointing this person to the Senate that they are incapable of rational thought and are determined to keep fighting the wars of the 1970’s, where that Senator still lives.
JohnB
July 26, 2013 at 3:41 pmRE the opening discussion: Stick to writing, Guy. Your statistics are cr*p.
Changing one’s mind for no reason will always be changing for no reason, in real life and maths. It’s 50/50.
AR
July 26, 2013 at 10:06 pmIn Grayndler,which has been nowt but ALP since inception, ALbanese’s sinecure has been pushed to preferences & bitten nails by the Greens in the last 3 elections.
Fred Daly, and even Leaping Leo McCleay – the original shiny trousered parachutist, callous free hands & sharp elbows, won on primary votes, Fred usually in the 70-80% and he wouldn’t have pissed on AA were he ablaze.