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The Guardian and Monbiot versus Forbes and Worstall

Dalyby Herman Daly

In his Guardian column, criticizing growth as “The Insatiable God,” George Monbiot writes:

Is it not also time for a government commission on post-growth economics? Drawing on the work of thinkers like Herman Daly, Tim Jackson, Peter Victor, Kate Raworth, Rob Dietz and Dan O’Neill, it would investigate the possibility of moving towards a steady state economy: one that seeks distribution rather than blind expansion; that does not demand infinite growth on a finite planet…

It is no surprise that we at CASSE strongly agree with Monbiot. Nor does it come as a surprise that a columnist for Forbes, Tim Worstall, would disagree. What is surprising is that Worstall uses me in support of his position (with which I disagree) and against Monbiot (with whom I agree). How does he manage such a reversal? By conflating growth (quantitative physical increase) with development (qualitative improvement), and claiming that 80% of GDP increase is due to qualitative “growth” (total factor productivity), and is therefore independent of increase in physical resource use–when in reality the “total” factor productivity increase in question is mainly caused by an increase in physical resource throughput. This requires further explanation.

In a previous article, also criticizing Monbiot, Worstall states his position more completely, as quoted below, [my brackets inserted].

Value add [added] is economic growth, not more stuff. And we can take this insight to an extreme as well, that extreme being the steady state economy proposed by Herman Daly. In this world resources are only abstracted from the environment if this can be done sustainably. And we recycle everything of course [not energy or highly dispersed materials]. So, in such a world can we still have economic growth? We have no more access to more stuff to make stuff out of: so is growth still possible? Yes, of course it is. For we can still discover new methods of adding value to those resources that we do have available to us through our recycling. Daly calls this qualitative growth rather than the quantitative growth that we cannot have. [Actually I speak of “qualitative improvement” to emphasize that technology is not a cardinally measurable quantity that can properly be said to grow]. But there’s absolutely no difference at all between this and the more conventional economic descriptions of growth. Qualitative growth is akin to growth through an increase in total factor productivity as opposed to growth via the use of more inputs [only remember that “more inputs” should include natural resources, but does not]. And Bob Solow once pointed out that 80% of the growth in the market economies in the 20th century came from tfp (total factor productivity) growth, not the consumption of more resources. We’re just using different words to describe exactly the same thing here [not really].

Now if this were true we could keep resource throughput constant, avoiding most of the increasing environmental costs of growth, and still have 80% of historical GDP growth. Once matter-energy throughput is stabilized at an ecologically sustainable level we could presumably have significant GDP growth forever with minimal environmental costs, thanks to increasing total factor productivity. I would be happy if that were true, but I am pretty sure that it is not. Nevertheless, if Forbes believes it, maybe they would then endorse a policy of limiting resource throughput (cap-auction-trade or carbon tax), and be content with still significant GDP growth based only on total factor productivity increase? Don’t hold your breath. Worstall explicitly discounts any notion of resource scarcity, so why limit throughput? But, just for good measure, he argues here that even with resource scarcity, technology can, by itself, provide most of our accustomed growth, as it supposedly has in the past.

Worstall’s source for the 80% figure is the “Solow Residual,” which is commonly misinterpreted as a measure of total factor productivity. As calculated, it is a measure of “two-factor” productivity, the two factors being labor and capital. The Cobb-Douglas production function that underlies this calculation omits natural resources, the classical third factor. This means that it cannot possibly be an accurate analytical representation of production. It is like a recipe that includes the cook and the oven, but omits the list of ingredients.

Photo Credit: Claire.Ly

As natural resources becomes increasingly scarce, can we afford to ignore their contributions to increases in production? Photo Credit: Claire.Ly

Value added has to be added to something, namely natural resources, by something, namely labor and capital. The cook and the oven add value to the ingredients, but nothing happens without the ingredients. Our empty-world economic accounting attributes all value to labor and capital, and treats natural resources in situ as superabundant free gifts of nature. But in today’s full world, resources are not only scarce but have become the limiting factor. Leaving the limiting factor out of the analysis makes the Cobb-Douglas production function not only incomplete, but also actively misleading.

Nevertheless, Worstall’s 80% figure comes from respected economists who have used the Cobb-Douglas production function in a statistical correlation–an exercise to see how much of increased production can be statistically explained by increases in labor and capital. The residual, what is not explained by labor and capital increase, is attributable to all causes other than labor and capital, including, for example, technology improvement and increased material and energy throughput (natural resource use).

A large residual indicates weak explanatory power of the theory being tested–in this case the Cobb-Douglas theory that production increase is due only to capital and labor increase. But instead of being embarrassed by a large unexplained residual, some economists were eager to “explain” it as an indirect measure of technological progress, as a measure of improvement in total factor productivity. But is technology the only causative factor reflected in the residual? No, there are surely others, most especially the omitted yet rapidly increasing flow of natural resources, of energy and concentrated minerals. The contribution of energy and materials from nature to production is also part of the residual, likely dwarfing technological improvement. Yet the entire residual is attributed to technology, to total factor productivity, or more accurately “two-factor” productivity, in the absence of natural resources, the classical third factor.

As the natural resource flow greatly increases, and capital and labor transform that growing resource flow into more products, then of course the measured productivity of capital and labor increases. This increased “total” factor productivity, due mostly to increase in the ignored factor of natural resources, is then appealed to as evidence of the unimportance of natural resources, given the “empirical finding” that total factor productivity improvement (technology) “explains” so much of the observed increase in production. This reasoning is clearly specious. It is the increased resource use that explains the increase in total factor productivity (i.e. two-factor productivity), which cannot then be used as a reason to discount the importance of its own cause, namely an increased flow of natural resources. Indeed, the unimportance of natural resources could not possibly be an empirical finding of any statistical analysis based on the Cobb-Douglas production function, because that function assumes the unimportance of natural resources from the beginning by omitting them as a factor of production. This is a big confusion and Worstall is not the only one misled by it.

In conclusion, I think the Guardian and Monbiot’s position is not in the least weakened by the criticism from Forbes and Worstall, but that reliance on the Cobb-Douglas production function should certainly be weakened.

Limits to Growth – of Stuff, Value, and GDP

by Brian Czech

I’m starting to think that perpetual growth notions are the Achilles heel of the human brain. They pop up like munchkins on a Whac-a-Mole machine. You smash one and up come two.

A recent example comes from Tim Worstall, a business and technology writer for Forbes. Like the long lineage of Homo polyannas before him, he assures his poor readers that we can have perpetually growing GDP without using more resources. He uses a variety of the old “growth is more value, not stuff” argument.

Worstall says, “It really is true that as value increases we have economic growth. And how are we determining that value? Through the market prices that people are willing to pay for them. And what is the determinant of that? Well, actually, it’s us. Our own often arbitrary and always subjective estimations of what something is worth to us. Which isn’t, as I hope can be seen, something that is bounded by any physical limit at all.”

Now I don’t know about you, but when someone is compelled to announce, “It really is true,” my “Prove It” flag pops up. And sure enough, Mr. Worstall has a lot to prove.

For starters, just exactly what evidence does Mr. Worstall have to support his notion that our estimations of value are unbounded? I don’t recall having or hearing of an experience where something just seemed to increase in value more, more yet, and forevermore. Do you? Now it may have seemed that way for some short period of time with something like coffee. But unless you’re moving into ecstasy ad nauseum – an oxymoron if there ever was one – the value of the experience was bounded. Right?

Why can’t Worstall and the perpetual growthers just face it with the rest of us: life is all about limits. Life, death, taxes, and limits. What’s wrong with limits, anyway? If there weren’t any, what value would a certain level of progress or satisfaction have? How would you measure it?

Now sure, you might “value” living more as you get closer to dying. You might try to measure this value and say, “I’m twice as concerned with living now.” You might even spend twice as much money on health food. That’s fine and understandable, but it’s not economic growth. If you spent more on health food, you had less to spend on coffee, chiropractic, or bingo at the Elks Club.

That brings us to an even bigger burden of proof begged by Mr. Worstall. The main point of his article is that all this ever-increasing appreciation or satisfaction or happiness, which requires not one jot or tittle of energy or material, will result in GDP growth! This, he lectures the scientists, is really what GDP growth is all about: increasing value, where value may increase without increasing use of energy and material.

Where’s the proof? Have we ever seen GDP increase without increasing use of energy and material? If the Worstalls of the world would only put their money where their mouths were, we could cap energy and material flows and test their hypothesis. But no, their mouths are preoccupied with perpetual growth slogans like “drill baby drill!”

But just for the sake of argument, let’s say we can wave a magic wand or a hypnosis gismo and have ever-growing value without the use of more energy and materials. All of a sudden, bread tastes better, suits look spiffier, hymns even sound holier. And that’s without using more energy or material. It’s all in the mind, you see.

So we spend more on it? Thus increasing GDP?

Prove it.

While the Worstalls of the world are busy with an exercise in futility, the rest of us can think about something more evident. Where does the money come from to spend on things of value? As Adam Smith noted in the Wealth of Nations, money originates when there is agricultural and extractive surplus. With agricultural surplus, not everyone has to farm. That frees the hands for the division of labor and the generation of real money to be spent on a variety of goods and services. Agricultural surplus is the physical basis of money and market expenditures.

Oh sure, we can double the supply of money overnight if we really want to. If we all wake up one morning insisting that we value everything twice as much, why not double the money supply to account for it? But that’s not growth in real GDP. It’s mental and monetary only. The mental part is fine — a nice mood at the least — but the monetary part is called inflation!

The foundation of the real human economy is the producers. Only with surplus production will there be expenditures on consumption. Growing GDP takes more surplus production. Such are the trophic origins of money, in ecological terms. But as Worstall said, “when extremely bright people step off their own knowledge base they can make very interesting mistakes when they attempt to explore other fields.” I don’t know if Worstall is extremely bright or not, but he obviously isn’t conversant with ecology, also known as the economy of nature. That sets him up poorly for economic matters. If you don’t get the basics of the real sector, you can make a real mess of the monetary sector.

If anyone still views this as an argument, maybe we can settle it democratically. After all, it seems that plenty of folks value democracy, so the more democratic the approach, the more valuable it should be (within limits, I’d say). So let’s take a vote. What do readers think is more feasible: Ever-growing satisfaction and ever-growing GDP with no additional stuff? Or declining satisfaction and declining GDP as the supply of stuff declines?

I’d like to hear your thoughts. I do value your opinion. But whether you give it or not, I won’t be spending a dime on it. GDP will just have to sit there.