Category: Science

A question about group selection

John Quiggin73 Comments

I’m doing some work on evolutionary models of game theory and need to understand the debate about group selection. It seems pretty clear that the great majority of evolutionary biologists reject the idea of group selection, but I haven’t found an adequate (to me) explanation of why they do so. A crucial problem for me is that the literature seems, without exception as far as I can see, to conflate group selection with co-operation and altruism. But the problem of group selection arises in non-cooperative settings, provided they are not zero-sum.

To illustrate the problem I’m struggling with, suppose that two previously isolated species meet as a result of some change. In one species (peacocks), competition between males for mates takes the form of elaborate, and energetically costly, displays. In the other species (penguins) males compete by providing food to their mates. In all other respects (diet, predators and so on) the two are similar. It seems obvious to me that the penguins, with their more efficient social arrangements, are going to outbreed the peacocks and eventually drive them to extinction.

It seems to me there are only two possibilities here
(a) My reasoning is wrong, and we can’t judge which species, if either, will dominate; or
(b) Even though it involves one group being selected over another, this isn’t what is meant by group selection

I’d really appreciate some help on this. I’m happy to have thoughts from anyone, but I’d most like to hear from actual experts with contact details.

Public funding for phlogiston ?

John Quiggin106 Comments

According to the Oz, Queensland LNP Senator Matt Canavan has called for public funding for research promoting his belief that scientists since Arrhenius have been wrong about climate change. He makes this claim on the basis that the overwhelming body of evidence amassed by mainstream science means that “only one side of the debate is heard” (there’s also something about witches). Oddly enough, Canavan goes on to cite some (presumably publicly funded) research on aerosols from the Max Planck Institute which he thinks supports his arguments. The fact that such research gets undertaken and published suggests that there is no problem with the scientific process as regards climate change.

Still, there’s an interesting question here. To what extent should research funding seek to promote research approaches that are regarded by most experts in the relevant field as wrong or discredited?

In fields like economics, the ebb and flow of opinion is such that any temporary appearance of consensus is illusory. When I started studying economics, the dominant Keynesian/market failure school regarded classical economics as a collection of exploded fallacies. Within a decade or so, the position had reversed. Free market microeconomics and New Classical microeconomics became dominant and remained so until the Global Financial Crisis. The position now is best described as confused. Something similar could be said of fields like psychology (another example where plenty of non-specialists have strongly held views)

In the natural sciences, there are a lot more firmly established conclusions, which nonetheless run against the prejudices of many (obviously including Senator Canavan). I don’t see any merit in funding the pet theories and tribal prejudices of politicians. But at the frontiers, there are lots of instances where some particular approach (such as string theory in particle physics) seem to be dominant, at least in part, for sociological reasons. Here it would be desirable to ensure that alternative approaches get a hearing.

Any thoughts?

Profit and public health

John Quiggin74 Comments

Amid the abandonment of tariff protection and the continued assaults on trade unionism, one union/lobby group has been consistently victorious. The Pharmacy Guild has managed to restrict competition so successfully that it’s impossible to open a pharmacy if it might hurt the profitability of an existing business, even if that business is failing to serve a significant group of customers. I ran into an example when I was at James Cook University in Townsville. A request for an on-campus pharmacy was rejected because it was within the market area claimed by a suburban pharmacy, more than a kilometre away and inaccessible by public transport.

Far more important to the Guild is the imperative of keeping supermarkets out of the pharmacy business. The key argument is that supermarkets are just businesses, happy to sell anything to make a buck, whether it’s cigarettes or cancer medications.

So, I was interested to read the Guild’s reaction to a proposal that medical professionals should stop prescribing homeopathic products. Whatever you might think about alternative/complementary medicines in general, homoepathy is plain quackery, combining a magical theory of medicine with the preposterous physics of water memory. Unsurprisingly, research has proved beyond any doubt that it’s no better than a placebo. So, the Royal Australian College of General Practitioners (RACGP) has formally recommended GPs stop prescribing homeopathic remedies and says pharmacists must also stop stocking such products.

The Guild’s reaction:

it is not a regulatory authority, and as such there will be no recommendation backing RACGP’s call for homeopathic products to be taken off the market.

In other words, selling medicine in the same shop as alcohol is unthinkable, but it’s entirely OK for a health professional to promote and sell water as a treatment for serious illness.

This episode demonstrates, to anyone who cares to look, that the Pharmacy Guild is (and in fact claims to be) nothing more than a rent-seeking lobby group, whose sole concern is the profitability of its members. As the Tobacco Institute of Australia would be quick to point out (if it were still around), there’s nothing illegal about that. But when profits and public health come into conflict, the Guild and the Institute are on the same side.

Anti-anti-anti-science

John Quiggin23 Comments

I’ve been meaning to write this post for a while, and Paul Krugman has given me a nice jumping off point with this column on how to respond to economists (including highly credentialled ones) who push zombie ideas such as the threat of imminent hyperinflation. As Krugman notes, providing evidence-based criticism, whether politely or rudely, has no impact on people who have strong reasons for wanting to believe something. This is even more true on topics like climate change than it is on economics.
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Researcher: a new term of art for #Newscorpfail ?

John Quiggin23 Comments

The Murdoch press has just about run out of scientists it can find to support its various anti-science jihads/crusades#. So, it seems to have come up with a new term of art. The word “researcher” is now the preferred Newscorp description of unqualified rightwingers doing bogus analyses that would never pass muster as peer-reviewed research. (Just to confuse things, the same term is used to describe genuine research.)

A couple of recent instances: Jennifer Marohasy*, a biology PhD who spent quite a few years heading the IPA Science Policy unit is cited as a “climate researcher” disputing the classification of Cyclone Marcia as a Category 5 (this is part of a general conspiracy-theoretic attack on the Bureau of Meteorology).

Steven Cooper, an acoustics engineer who conducted an anti-wind farm study with a sample size of six(!), is also described as a “scientific researcher”.

Are these isolated cases, or can readers point to more along the same line?

# The terms have the same meaning: pick whichever you prefer
* Her name is spelt Morohasy in some reports.

Reality finally bites for Willie Soon

John Quiggin26 Comments

Among the handful of apparently reputable scientists who deny mainstream climate science, Willie Wei-Hock Soon, regularly described as a Harvard astrophysicist (he’s actually an aerospace engineer working for the Smithsonian, which has a joint centre with Harvard), has been among the most prominent and durable. His biggest hit was his 2003 paper with Sallie Baliunas* which brought about the resignation of half of the editorial board of the journal concerned.

Soon has finally come unstuck, having failed to declare his funding from fossil fuel interests and the Koch brothers in a number of articles, thereby violating the requirements of the journals that published him. The New York Times has a lengthy and unflattering expose.

The only surprise is that this took so long, and that Soon has been allowed to do so much damage to science. Still, the supply of seemingly credible deniers is small enough that discrediting even one makes a difference.

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Vaccination a partisan issue in the US? (crosspost from Crooked Timber)

John Quiggin130 Comments

Some recent statements by Chris Christie and Rand Paul[^1] have raised the prospect that vaccination, or, more precisely, policies that impose costs on parents who don’t vaccinate their kids, may become a partisan issue, with Republicans on the anti-vax (or, if you prefer, pro-freedom) side and Democrats pushing a pro-vaccine, pro-science line. Christie and Paul took a lot of flak from other Republicans and even Fox News, and tried to walk their statements back, so it seems as if it won’t happen just yet.

But there are some obvious reasons to think that such a divide might emerge in the future, and that Christie and Paul just jumped the gun. The outline of the debate can be seen in the ferocious response to Reason magazine’s endorsement of mandatory vaccination. And, while Reason was on the right side this time, they’ve continually cherrypicked the evidence on climate change and other issues to try to bring reality in line with libertarian wishes.

The logic of the issue is pretty much identical to that of climate change, gun control, and other policies disliked by the Republican/schmibertarian base. People want to be free to do as they please, even when there’s an obvious risk to others and don’t want to hear experts pointing out those risks.[^2] So, they find bogus experts who will tell them what they want to hear, or announce that they are “skeptics” who will make up their own minds. An obvious illustration of the parallels is this anti-vax piece in the Huffington Post by Lawrence Solomon, rightwing author of The Deniers, a supportive account of climate denial[^3].

As long as libertarians and Republicans continue to embrace conspiracy theories on issues like climate science, taking a pro-science viewpoint on vaccination just makes them “cafeteria crazy”. The consistent anti-science position of people like Solomon is, at least intellectually, more attractive.

Note Another issue that fits the same frame is speeding. Anti-science ibertarians in Australia and the UK are strongly pro-speeding, but I get the impression that this isn’t such a partisan issue in the US, the reverse of the usual pattern where tribalist patterns are strongest in the US.

[^1]: Christie was just pandering clumsily, but Paul’s statement reflects the dominance of anti-vax views among his base and that of his father (take a look at dailypaul.com).
[^2]: Of course, the situation is totally different in cases like Ebola and (non-rightwing) terrorism, where it’s the “others” who pose the risk.
[^3]: The Huffington Post used to be full of leftish anti-vaxers. But the criticisms of Seth Mnookin and others produced a big shift – Solomon’s was the only recent example I could find. Similarly, having given equivocal statements back in 2008, Obama and Clinton are now firmly on the pro-vaccine side.