Global warming and externalities

How a carbon tax can "solve" global warming

Tim Worstall (yes, when he's not trolling he's quite good) has a piece up at the Telegraph explaining how carbon taxes work, and why they could "solve" global warming:

In economic theory, the problem here is that my actions that create emissions also damage someone else. But I don't have to pay for the damage I've caused. This is called an externality and the economists' solution is something called a Pigou Tax. That is, we add a tax equal to the damage I'm doing, so that I do pay for that damage.

Worstall cites the Stern Review's figure of $80 per tonne of CO2 as a good starting ground for where to set a carbon tax, and explains why it's the most efficient way to deal with climate change:

As a made-up example: my car emits one tonne CO2 when I drive it to buy fresh bread for lunch. That's $80 of damage I cause in the future by doing so. But the benefit to me is trivial: if you paid me 50p (alright, £5 in the rain) I'd cycle instead and not emit the CO2. The value to me of driving is that 50p; the costs to someone else are the $80. Clearly, this is a bad deal for everyone else: they're bearing costs much greater than the benefit to anyone at all. An $80 a tonne tax would get me cycling and that would be a good thing: I've stopped doing something where the benefit is lower than the cost.

However, we've a pregnant woman in pre-eclampsia. She needs to go to hospital in an ambulance which is going to emit that tonne, that $80 worth of CO2. Without it she and the child will be dead; with it they'll be fine. We usually value a statistical life in the £2 – 3 million range. That's what the railways will spend on safety to save a life on average. Or we could use the £50,000 that NICE applies to one year of good-quality life. If your drug treatment costs more than this, then you won't get it on the NHS; less and you might. Different numbers but much the same outcome: burn that fuel and damn the $80 of future damages, because they're much lower than the benefits that are achieved right now from burning that fuel.

This efficiency is why a carbon tax – or the harder to impose, but fairer and economically identical "cap-and-trade" system – really is the best way to deal with global warming. By definition, it deals with "bad" emissions while allowing "good" ones, and it does so far better than a legislature could ever hope to with a sprawling network of tariffs and subsidies.

But Worstall does somewhat overstate the case in one area, when he writes:

The other part [of a reader's question] – what's the point if we're not going to spend the money on green projects? – misunderstands the purpose of the tax. We're not trying to raise money: we're trying to change prices.

Changing prices is only half the effect of a carbon tax – or any Pigou tax. The other half is compensating the "victim" for their loss.

Suppose we live in a little two person economy where every tonne of CO2 you produce causes $80 worth of flooding damage to me. Imposing a carbon tax solves half the problem, in that it stops you polluting if you only get $10 benefit from it. But it doesn't solve what happens if you can make $100 from polluting.

In that case, you pay $80, and make $20 profit. I'm still left with $80 of flooding damage. The proper use of the money raised is to compensate the me for that loss. Otherwise, a tax which merely sorts out externalities becomes a revenue-raising tool of Government. In practice, this means that money raised from a carbon tax should be used on "green projects".

Which would annoy Worstall's fellow Telegraph blogger James Delingpole.

Anti-carbon tax protestors in Australia. Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

Photo: Getty
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Leaving the cleaning to someone else makes you happier? Men have known that for centuries

Research says avoiding housework is good for wellbeing, but women have rarely had the option.

If you want to be happy, there is apparently a trick: offload the shitwork onto somebody else. Hire cleaner. Get your groceries delivered. Have someone else launder your sheets. These are the findings published by the Proceedings of the National Academy of Sciences, but it’s also been the foundation of our economy since before we had economics. Who does the offloading? Men. Who does the shitwork? Women.

Over the last 40 years, female employment has risen to almost match the male rate, but inside the home, labour sticks stubbornly to old patterns: men self-report doing eight hours of housework a week, while women slog away for 13. When it comes to caring for family members, the difference is even more stark: men do ten hours, and women 23.

For your average heterosexual couple with kids, that means women spend 18 extra hours every week going to the shops, doing the laundry, laying out uniform, doing the school run, loading dishwashers, organising doctors' appointments, going to baby groups, picking things up, cooking meals, applying for tax credits, checking in on elderly parents, scrubbing pots, washing floors, combing out nits, dusting, folding laundry, etcetera etcetera et-tedious-cetera.

Split down the middle, that’s nine hours of unpaid work that men just sit back and let women take on. It’s not that men don’t need to eat, or that they don’t feel the cold cringe of horror when bare foot meets dropped food on a sticky kitchen floor. As Katrine Marçal pointed out in Who Cooked Adam Smiths Dinner?, men’s participation in the labour market has always relied on a woman in the background to service his needs. As far as the majority of men are concerned, domestic work is Someone Else’s Problem.

And though one of the study authors expressed surprise at how few people spend their money on time-saving services given the substantial effect on happiness, it surely isn’t that mysterious. The male half of the population has the option to recruit a wife or girlfriend who’ll do all this for free, while the female half faces harsh judgement for bringing cover in. Got a cleaner? Shouldn’t you be doing it yourself rather than outsourcing it to another woman? The fact that men have even more definitively shrugged off the housework gets little notice. Dirt apparently belongs to girls.

From infancy up, chores are coded pink. Looking on the Toys “R” Us website, I see you can buy a Disney Princess My First Kitchen (fuchsia, of course), which is one in the eye for royal privilege. Suck it up, Snow White: you don’t get out of the housekeeping just because your prince has come. Shop the blue aisle and you’ll find the Just Like Home Workshop Deluxe Carry Case Workbench – and this, precisely, is the difference between masculine and feminine work. Masculine work is productive: it makes something, and that something is valuable. Feminine work is reproductive: a cleaned toilet doesn’t stay clean, the used plates stack up in the sink.

The worst part of this con is that women are presumed to take on the shitwork because we want to. Because our natures dictate that there is a satisfaction in wiping an arse with a woman’s hand that men could never feel and money could never match. That fiction is used to justify not only women picking up the slack at home, but also employers paying less for what is seen as traditional “women’s work” – the caring, cleaning roles.

It took a six-year legal battle to secure compensation for the women Birmingham council underpaid for care work over decades. “Don’t get me wrong, the men do work hard, but we did work hard,” said one of the women who brought the action. “And I couldn’t see a lot of them doing what we do. Would they empty a commode, wash somebody down covered in mess, go into a house full of maggots and clean it up? But I’ll tell you what, I would have gone and done a dustman’s job for the day.”

If women are paid less, they’re more financially dependent on the men they live with. If you’re financially dependent, you can’t walk out over your unfair housework burden. No wonder the settlement of shitwork has been so hard to budge. The dream, of course, is that one day men will sack up and start to look after themselves and their own children. Till then, of course women should buy happiness if they can. There’s no guilt in hiring a cleaner – housework is work, so why shouldn’t someone get paid for it? One proviso: every week, spend just a little of the time you’ve purchased plotting how you’ll overthrow patriarchy for good.

Sarah Ditum is a journalist who writes regularly for the Guardian, New Statesman and others. Her website is here.