Wage stagnation in the US: more than meets the eye

If you can, always look below the surface of data.

Via the Economist journalist Daniel Knowles comes a good example of why its important to look below the surface of statistics. American economist Steve Landsburg addresses a commonly heard refrain – that the wage of the median worker has barely risen in the past thirty years – and shows that all is not as it seems.

Landsburg cites a book by economist Edward Conard (first chapter, containing what we're talking about, here), which itself cites the Census Bureau. I confess that, without a more specific citation, I can't find the exact data Conard uses, but have found similar enough data (pdf, table A-5) to confirm the overall thrust of the argument.

Conard shows that from 1980 to 2005, median income in the US rose just 3 per cent once inflation is taken into account, from $25,000 to $25,700. 2005 is pre-crash, as well, so this isn't a tale of the recession.

But when you break the data down by race and gender, a very different story appears:

  1980 Median 2005 Median Increase
All Workers 25,000 25,700 3%
White Men 30,700 35,200 15%
Nonwhite Men 19,300 22,300 16%
White Women 11,200 19,600 75%
Nonwhite Women 10,200 16,500 62%

For every single demographic group, there was a much bigger increase in the median wage than we see when the groups are combined. The reason for this is obvious when it's pointed out: demographic change in the US means that there are far more (low-salaried) women and people of colour working now than there were in 2005, which pushes the overall average down.

Landsburg illustrates it with a farmyard analogy:

Imagine a farmer with a few 100-pound goats and a bunch of 1000-pound cows. His median animal weighs 1000 pounds. A few years later, he’s acquired a whole lot more goats, all of which have grown to 200 pounds, while his cows have all grown to 2000. Now his median animal weighs 200 pounds.

A very silly person could point out to this farmer that his median animal seems to be a lot scrawnier these days. The farmer might well reply that both his goats and his cows seem to be doing just fine, at least relative to where they were.

This is almost an example of Simpson's Paradox, a well-known (to stats nerds) effect where the direction of a correlation disappears when that correlation is disaggregated. I was taught it with an example involving racial discrepancies in application of the death penalty:

Sixty per cent of white murderers are executed for their crimes, and fifty per cent of black murderers. Are black people discriminated against in the application of the death penalty?

Now suppose that we break down the murder victims by race as well. We find the common pattern that people tend to attack victims of their own race:

Number of murders where death penalty is applied

White Murderer Black Murderer
White Victim 50/70=71% 25/30=83%
Black Victim 10/30=33% 25/70=36%

What about now? Does it begin to look like black people are discriminated against? In this example, black people are more likely to be executed for the murder of black or white victims; but because the murder of black victims isn't taken as seriously by the courts, the fact that murderers predominantly attack people of their race makes it look like black people are less likely to be executed than white people.

The median income example isn't quite a case of Simpson's Paradox, because there is still a positive increase in wage whether or not the statistics are disaggregated. But it's still an example of a time when it is best to dig beneath the surface.

But there is more to be said on the story of wage stagnation. Because a second claim normally accompanies the belief that US wages have stagnated, and that is that there has been a "decoupling" of wages. Due to rising inequality, the median household wage hasn't risen as fast as the mean wage:

If we've seen that the median wage grows faster when disaggregated, then the solid red line is likely to take a steeper ascent. But what happens to the dashed red line when disaggregated?

Sadly, I cannot find the data required to answer the question. If anyone knows where to look, tell me, and maybe we can put the issue to rest.

An immigrant worker protests in Orlando, Florida. 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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No, the battle in Momentum isn't about young against old

Jon Lansman and his allies' narrative doesn't add up, argues Rida Vaquas.

If you examined the recent coverage around Momentum, you’d be forgiven for thinking that it was headed towards an acrimonious split, judging by the vitriol, paranoia and lurid accusations that have appeared online in the last couple days. You’d also be forgiven for thinking that this divide was between a Trotskyist old guard who can’t countenance new ways of working, and hip youngsters who are filled with idealism and better at memes. You might then be incredibly bemused as to how the Trotskyists Momentum was keen to deny existed over the summer have suddenly come to the brink of launching a ‘takeover bid’.

However these accounts, whatever intentions or frustrations that they are driven by, largely misrepresent the dispute within Momentum and what transpired at the now infamous National Committee meeting last Saturday.

In the first instance, ‘young people’ are by no means universally on the side of e-democracy as embodied by the MxV online platform, nor did all young people at the National Committee vote for Jon Lansman’s proposal which would make this platform the essential method of deciding Momentum policy.

Being on National Committee as the representative from Red Labour, I spoke in favour of a conference with delegates from local groups, believing this is the best way to ensure local groups are at the forefront of what we do as an organisation.

I was nineteen years old then. Unfortunately speaking and voting in favour of a delegates based conference has morphed me into a Trotskyist sectarian from the 1970s, aging me by over thirty years.

Moreover I was by no means the only young person in favour of this, Josie Runswick (LGBT+ representative) and the Scottish delegates Martyn Cook and Lauren Gilmour are all under thirty and all voted for a delegates based national conference. I say this to highlight that the caricature of an intergenerational war between the old and the new is precisely that: a caricature bearing little relation to a much more nuanced reality.

Furthermore, I believe that many people who voted for a delegates-based conference would be rather astounded to find themselves described as Trotskyists. I do not deny that there are Trotskyists on National Committee, nor do I deny that Trotskyists supported a delegates-based conference – that is an open position of theirs. What I do object is a characterisation of the 32 delegates who voted for a delegates-based conference as Trotskyists, or at best, gullible fools who’ve been taken in.  Many regional delegates were mandated by the people to whom they are accountable to support a national conference based on this democratic model, following broad and free political discussion within their regions. As thrilling as it might be to fantasise about a sinister plot driven by the shadow emperors of the hard Left against all that it is sensible and moderate in Momentum, the truth is rather more mundane. Jon Lansman and his supporters failed to convince people in local groups of the merits of his e-democracy proposal, and as a result lost the vote.

I do not think that Momentum is doomed to fail on account of the particular details of our internal structures, providing that there is democracy, accountability and grassroots participation embedded into it. I do not think Momentum is doomed to fail the moment Jon Lansman, however much respect I have for him, loses a vote. I do not even think Momentum is doomed to fail if Trotskyists are involved, or even win sometimes, if they make their case openly and convince others of their ideas in the structures available.

The existential threat that Momentum faces is none of these things, it is the propagation of a toxic and polarised political culture based on cliques and personal loyalties as opposed to genuine political discussion on how we can transform labour movement and transform society. It is a political culture in which those opposed to you in the organisation are treated as alien invaders hell-bent on destroying it, even when we’ve worked together to build it up, and we worked together before the Corbyn moment even happened. It is a political culture where members drag others through the mud, using the rhetoric of the Right that’s been used to attack all of us, on social and national media and lend their tacit support to witch hunts that saw thousands of Labour members and supporters barred from voting in the summer. It is ultimately a political culture in which our trust in each other and capacity to work together on is irreparably eroded.

We have a tremendous task facing us: to fight for a socialist alternative in a global context where far right populism is rapidly accruing victories; to fight for the Labour Party to win governmental power; to fight for a world in which working class people have the power to collectively change their lives and change the societies we live in. In short: there is an urgent need to get our act together. This will not be accomplished by sniping about ‘saboteurs’ but by debating the kind of politics we want clearly and openly, and then coming together to campaign from a grassroots level upwards.

Rida Vaquas is Red Labour Representative on Momentum National Committee.