If only they had come up with a cool name

When discussing the Hyperlink, it is essential to keep in mind that, though they may not have been combined in exactly this form in a widely publicized version before, the basic elements have been discussed extensively by countless engineers for a long time now.

From Wikipedia:

Russian professor Boris Weinberg offered a vactrain concept in 1914 in the book Motion without friction (airless electric way). He also built the world's first model of his proposed transport in Tomsk Polytechnic University in 1909.

I believe the illustration below is from 1917 (but I'm a bit confused by the annotation on the Wikisource page).

Damn you, Tom Simonite!

Earlier this week, I sent out emails to some transportation researchers asking about Tesla's argument that Autopilot saves lives because the system had one fatality in 130 million miles, the average for U.S. roads as a whole is one per 94 million. It appeared that those 130 were disproportionately driven under safer-than-average conditions, making the comparison largely meaningless.

Unfortunately, all of the points I wanted to make in my post (and then some) were covered yesterday in this excellent piece by Mr. Simonite of the MIT Technology Review.

Soon after, Tesla’s CEO and cofounder Elon Musk threw out more figures intended to prove Autopilot’s worth in a tetchy e-mail to Fortune (first disclosed yesterday). “If anyone bothered to do the math (obviously, you did not) they would realize that of the over 1M auto deaths per year worldwide, approximately half a million people would have been saved if the Tesla autopilot was universally available,” he wrote.

Tesla and Musk’s message is clear: the data proves Autopilot is much safer than human drivers. But experts say those comparisons are worthless, because the company is comparing apples and oranges.

“It has no meaning,” says Alain Kornhauser, a Princeton professor and director of the university’s transportation program, of Tesla’s comparison of U.S.-wide statistics with data collected from its own cars. Autopilot is designed to be used only for highway driving, and may well make that safer, but standard traffic safety statistics include a much broader range of driving conditions, he says.

Tesla’s comparisons are also undermined by the fact that its expensive, relatively large vehicles are much safer in a crash than most vehicles on the road, says Bryant Walker Smith, an assistant professor at the University of South Carolina. He describes comparisons of the rate of accidents by Autopilot with population-wide statistics as “ludicrous on their face.” Tesla did not respond to a request asking it to explain why Musk and the company compare figures from very different kinds of driving.

Google has in the past drawn similar contrasts between the track record of its self-driving cars and accident statistics for humans, says Smith. He, Kornhauser, and other researchers argue that companies working on autonomous driving technology need to drop such comparisons altogether. In April, a RAND Corporation report concluded that fatalities and injuries are so rare that it would require an automated car to drive as many as hundreds of billions of miles before its performance could be fairly compared with statistics from the much larger population of human drivers.

Instead researchers say that Tesla and others need to release more data on the limitations and performance of automated driving systems if self-driving cars are to become safe and understood enough for mass market use.

You should read the whole thing.

The near miss effect -- what compulsive gamblers and tech reporters have in common [repost]

[This piece from 2014 seems once again relevant given our Hyperloop and Tesla threads.]

A few days ago I posted a bit of a rant about how excited tech reporters got over a Google press release about the company's driverless car. The problem was that, based on the details available in the reports, there didn't seem to be any significant indications of increased functionality.

Of course, reporters have a strong incentive to see signs of progress -- "just around the corner" sells better than "don't get your hopes up" -- but I think this eagerness has more than one cause (most things do) and I wonder if one of those factors might have something to do with the near-miss effect as described in this memorable story from This American Life:

Sarah Koenig

Habib and especially Dixon have spent a long time studying what's called the near-miss effect. In slot machines, a near miss is just what it sounds like. It's when, say, two cherries line up on the payoff line, and then the third is about to come but stops just short or just past the payoff line.

...

Sarah Koenig

In 2006, Dixon teamed up with Habib to see if they could figure out what was happening to people neurologically when they saw near misses. They scanned the brains of 22 gamblers-- 11 addicted, or what they called pathological gamblers, and 11 non-pathological gamblers-- as all these people watch near misses on slot machine displays.

The results surprised them. Because while both addicted and non-addicted gamblers said the near misses felt more like wins, their brains said something different. Here's Reza Habib.

Reza Habib

What you see in the non-pathological gamblers is that the regions that are activated for losses, those same regions tend to be also activated for near misses. And so the brain, at least, processes these near misses in the same way that it processes losses in the non-pathological gamblers. In pathological gamblers, the same regions that are activated for wins are also activated for near misses.

And so these include regions such as the amygdala, which is a region involved in emotional processing, as well as parts of the brain stem which are involved in reward and dopamine function, which is part of the reward system. So the pathological gamblers, their brains, at least, are responding to these near misses in the same way that they respond to wins.

Mark Dixon

This is Mark again. And one of the effects of this, or the implications of these data, are that a pathological gambler going into the casino who's actually losing, his brain is firing like he's winning. Disturbing, isn't it.

Sarah Koenig

Yeah. It's crazy.

Mark Dixon

Oh, it's way crazy. And so you are experiencing those same sensations as a win when you're not winning.

Just as casinos are very good at eliciting the reactions associated with winning even when very little winning is going on, companies like Apple and Google have become very good at eliciting the reactions associated with technological progress even when the technology is advancing little and sometimes not at all. In this case, Google assumed correctly that, by showing journalists a prototype that looked different but apparently did nothing new, the reporters would react as if they had seen an advance in the technology. They respond to these meaningless press conferences in much the same way as a pathological gambler responds to two cherries out of three.

If anything, the shift to custom-made, low-speed cars would seem to be a sign of trouble. Google's stated goal is to release this technology to manufacturers in 2018. Whenever you're designing complex systems that have to work with complex systems designed by others, compatibility is usually more than half the battle. I would therefore expect some of the most daunting engineering challenges to come from getting Google's technology to work smoothly with a wide range of makes and models. The decision to go from road testing Toyota Priuses ('Prii' believe it or not) and Audi TTs to track testing what are basically go-carts does not make the four year goal look more likely.

What happens if that deadline isn't met? I suspect it will still be business as usual. Google has proven that merely symbolic progress or, failing even that, just bringing the subject up is enough to create the desired effect of public perception. My guess is that the only real deadline is beating GM, Mercedes-Benz, or Nissan or any of the other companies that have equally gifted engineers working on these problems (but with less gifted PR departments to promote them).

In that last paragraph you can substitute in SpaceX, Solar City and the Hyperloop

From a very good article by Rick Newman

Tesla never should have said its cars operate on 'autopilot'

Tesla (TSLA) has never sold a self-driving car. No automaker has. The technology isn’t ready for the public yet.

Yet Tesla offers an option on its Model S sedan called “Autopilot,” which apparently factored into a fatal accident on May 7 in central Florida, which the federal government is now investigating. It’s the first known incident in which self-driving automotive technology may have contributed to a fatality, and it comes as Tesla is facing financial strains and is attempting a controversial tie-up with Solar City (SCTY) that shareholders may squash.

...

But Tesla has gone much farther than any other automaker in promoting its self-driving technology, and branding it as a breakthrough – which it’s not, really. “Autopilot” is a term borrowed from the aviation industry, and it refers to planes that are flown almost entirely by computers except during takeoff, landing and unexpected events at altitude. Autonomous technology for cars is nowhere near as advanced as it is for airplanes, which Tesla itself acknowledges, in a fine-print kind of way.

...

The cameras, lasers, sonars and other sensors that gather the info allowing computers to make driving decisions still aren’t as good as ordinary human drivers are at reacting to the unexpected craziness that occurs on America’s roads. At a conference in Boston earlier this year, MIT engineering professor John Leonard showed video footage of several things self-driving technology still can’t master, such as a police officer waving traffic forward through a red light, which contradicts coding that says cars should stop at red lights.

At the same conference, Gil Pratt, CEO of the Toyota Research Institute, said, “We don’t have any autonomous car yet where the car, on average, is better than a person.” Just about all the experts agree that while sensors and computers might be better at piloting a vehicle on a predictable route with no surprises – plus, computers don’t drink, do drugs or get emotional – technology still struggles to make good split-second decisions when something that’s not in the database occurs. Bright light, driving rain, snow and confusing construction detours still confound automotive sensors.

...

The traditional automakers are impressed with the fact that Tesla has brought compelling products to market against steep odds. But they’re also dismissive of Musk’s penchant for hype and his habit of claiming leadership on technologies that Big Auto has been developing for decades, and rolling out cautiously. A safety expert for Volvo, which probably focuses more on safety than any other automaker, told the Verge in April that Tesla’s Autopilot feature is “an unsupervised wannabe…. it gives you the impression it’s doing much more than it is.”

It's hard to believe, but we've been hammering away at the autonomous car story for over five years now, and in all that time, the pattern has remained remarkably consistent.

Ddulite journalists have, with very few exceptions, stuck close to a fundamentally flawed narrative that understates the serious problems with the technology, overstates the impediments of regulation, and fetishizes the role of visionary entrepreneurs.

This fetishizing has reached its zenith with Elon Musk. As I said earlier, the basic scenario described here with Tesla applies to virtually all of the man's enterprises. He has some good ideas, moves quickly, and tends to shake things up in a positive way, but the hype-to-substance ratio is astounding, the businesses invariably run on large checks from the government and still frequently manage to lose money, and the technological advances often owe most of their foundation to other companies.

In lieu of fireworks, here's some data visualization for the 4th

I realize that's probably not how the creator thought of it, but bear with me. Starting with a complex subject, this video presents a great deal of information in a clear and unambiguous fashion. What's more, it holds the interest, is aesthetically pleasing, and can give us real insight into the subject. Isn't that what we look for in data visualization?

(And wouldn't you rather listen to Franz Liszt's Hungarian Rhapsody rather than some guy talking about GDP?)



Liszt Hungarian Rhapsody 2


 

This is the sound of the sky not falling

From the LA Times:

Fatal crash of Tesla Model S in autopilot mode leads to investigation by federal officials

Federal regulators opened a preliminary probe into the autopilot feature on a Tesla Model S electric car after a fatal crash involving the technology, Tesla said Thursday.

The fatality – thought to be the first in the auto industry related to an autopilot feature – sparked questions about the limitations of the technology and its place in what is seen as an inevitable march toward self-driving vehicles. It followed other recent incidents in which drivers reported collisions while using such technology.

The male driver died in a May 7 crash in Williston, Fla., when a big rig made a left turn in front of his Tesla.

In a blog post, Tesla Motors Inc. said the 2015 car passed under the trailer, with the bottom of the trailer hitting the Model S’ windshield.

“Neither autopilot nor the driver noticed the white side of the tractor-trailer against a brightly lit sky, so the brake was not applied,” Tesla said.

Tesla said it immediately reported the fatal crash to the National Highway Traffic Safety Administration. The automaker emphasized that its autopilot feature is still in a beta phase of introduction and has limitations.

...

The need to maintain control became clear to Aaron Souppouris when he test-drove a Model S in April. Souppouris, a senior editor at the blog Engadget, said Tesla loaned him the car for an article about the autopilot feature and he drove it about 500 miles around England.

There were times at night, he said, when the car went back and forth within a lane and seemed “skittish,” he said.

Once on autopilot, the car tried to change lanes but then reverted back suddenly, and another time it disengaged the autopilot mode in the middle of a lane switch, Souppouris said. The car did better during the day than at night, he said.

I should probably do the smart thing and hold off until we see how things shake out, but I'm going to make a prediction:

This is not going to be that big of a deal.

According to the standard narrative this should be huge; the story has always been one of yet another good-to-go transformative technology kept out of our hands by lawyers and bureaucrats. One of the recurring comments in the reporting was that the first time a self-driving car was involved in a serious accident the result would be a litigious nightmare.

The truth is that the main reason we don't have fully autonomous cars is that parts of the technology have been remarkably hard to crack. Furthermore, the potential economic and environmental impact of driverless cars (level 4 or 5 depending on which scale you prefer) has been overstated, while far-less-hyped semi-autonomous features like adaptive cruise control and automatic braking are already revolutionizing auto safety.

There may be a lawsuit or some regulatory tightening after this, but these things will probably be minor factors (I'd worry more about the PR hit). The main problem facing Tesla is still the inability to turn a profit, and no amount of business-friendly policies will save a company that can't manage that.

You need to watch this

I don't want to give anything away except to say that the journalistic criticism you'll find here is a damned sight sharper than anything you'll find in the New York Times or in On the Media.

This would also be perhaps the first time a question starting with "how does it feel" will produce an interesting answer

As we've observed before, a handful of journalists and pundits have actually managed not only to maintain but to enhance their reputations through the recent primary. Some names that come to mind are Chait, Krugman, Ornstein & Mann and perhaps most of all, Josh Marshall. Over the past year, I don't think anyone has been better at what Orwell would call seeing one's noise in front of one's face than TPM's founder.

In an earlier post, we addressed the unique role that emotional gratification has played in the Trump campaign and speculated on how the candidate might react to the plummeting levels of fun. In a recent post, Marshall goes a step further, from not-having-a-good-time to “psychic disembowelment.”

If you are campaigning on the fact that you're a winner but you're losing, the premise of your campaign just falls apart.

Just as polls created a positive feedback loop for Trump in the primaries, where they seemed to confirm that no transgression or conventional misstep could hurt him, he is now entering a negative feedback loop with the same polls. The perception of losing amplifies every misstep. It makes him lose more both because the premise of the campaign starts to collapse in on itself but, relatedly, the brittle edifice of a narcissistic ego starts to come under an insuperable strain.

Put simply, he gets more erratic.

I suspect that in a couple months this will become the sum of most of the Democrats attacks on Trump both because it undermines the central premise of his campaign ("I always win; and I can make you win too.") but also because these attacks cut visibly cut Trump so deeply, triggering a sort of psychic disembowelment. You can see this in the increasingly irritated and thin-skinned responses to criticism or any references to his flagging campaign efforts.

...

At some point in the not distant future, some reporter - probably a not altogether pleasant one - will ask Trump: "How does it feel to be losing so badly? Just on a personal level? Does it hurt? Do regret getting into this?" It won't be pretty because Trump's ego is fragile. From there I suspect you'll see it cropping up in campaign attacks from every direction.

As mentioned before, under normal circumstances, psychoanalyzing presidential candidates is almost always a waste of time, but these are clearly special times. Addressing Trump's motives and emotional problems is not only productive; it's practically unavoidable.

Brexit Bregrets or Polls as Self-refuting Prophesies

I haven't been closely following either the Brexit in general or the Brexit polling in particular, so I don't want to go out on any limbs speculating about what drove what except to note that this post from Scott Lemieux raises an interesting possibility.

I don’t know how many Brexit voters fall into the remorseful category. But I remember seeing somewhere (HELP ME BROCKINGTON) that a large majority of Brexit voters assumed that Remain would win. For what was surely a decisive number of Brexit voters, the vote was not a considered view that leaving the EU would be better than remaining, but rather was a vehicle for sending a message to British elites. 

I'm not saying that this was a factor but just as an intellectual exercise, try this. Imagine that widely reported polls contributed to the perception that the voters would chose to remain. That in turn created the perception that "leave" was a safe protest vote. Does it make sense to say that the polls were wrong in this context?

Still coming up to the edge of the 1964 analogy

As mentioned before, I don't want to push this too far. For one thing, I don't see anything analogous to the Vietnam War and the draft currently on the horizon, which leaves a pretty big hole in the "look what happened then" argument. 1964 might give us some idea what to expect in November, but I don't see much point in looking to 1968 as a guide 2020 (or 1980 as a guide to 2032).

All that said, it has, at the very least, been entertaining looking for points of comparison. Which brings us to Henry M. Paulson Jr. writing for the Washington Post

Simply put, a Trump presidency is unthinkable.

As a Republican looking ahead to November, there are many strong conservative leaders in statehouses across the United States and in Congress, whose candidacies I am actively supporting. They have a big job to do to reinvent and revitalize the Republican Party. They can do so by responding to the fears and frustrations of the American people and uniting them behind some common aspirations, while staying constant to the principles that have made our country great.

When it comes to the presidency, I will not vote for Donald Trump. I will not cast a write-in vote. I’ll be voting for Hillary Clinton, with the hope that she can bring Americans together to do the things necessary to strengthen our economy, our environment and our place in the world. To my Republican friends: I know I’m not alone.

and yet another spin in the way-back machine.





And while we're here.

"Whom are you voting for? This guy can read your mind." -- with that headline, what could go wrong?

A few quick thoughts on this WaPo piece by Jacob Bogage:

Neuroscientist Ryan McGarry swabbed a brain activity headset with saline solution and lowered it onto Brian Hazel’s head, connecting circular prongs gingerly to different spots on his skull.

Then he showed Hazel 40 minutes of presidential debates and commercials as Spencer Gerrol tried to read his mind. Which of the candidates did Hazel, an African American real estate professional in his 40s, support?

Gerrol, founder and chief executive of creative agency Spark Experience, based in Bethesda, Md., stared through a one-way mirror from an observation room. “Trump,” he said five minutes into Hazel’s session.

Gerrol was right. “Donald Trump,” Hazel said after his session. “I’m all about jobs, and if I look at the whole field and who has created the most jobs, I think he would be able to do that better than anyone else.”

Spark's experiment is leading a new method of human factors research, which asks test subjects to interact normally with everyday products or services while researchers track their emotional reaction and attentiveness. The agency gathers data from four tests — electroencephalograms, galvanic skin responses, eye tracking and microfacial recognition — to instantaneously determine which candidate a subject supports, down to the severity of emotional response.

The firm gathered more than 30 test subjects from across the political spectrum in May. Their findings, released last week, show that what people feel and what they say they feel are rarely the same.

The experiment might be the closest the country gets to an explanation of this crazy presidential campaign without dissecting a brain.

Instead of placing participants in focus groups or asking them to fill out a questionnaire, experimenters harvest data directly from the brain using technology called "BrainWave." Companies such as Nielsen and Affectiva also conduct similar testing, which can gauge the effectiveness of advertisements and viewer response to TV shows and movies.

“This isn’t science fiction,” Gerrol said. “I can’t read your thoughts, but I can read your emotions.”

...

But it has particular application this election cycle because voters' responses have been so unpredictable. Spark's study may have provided some answers, namely that test subjects may subconsciously lie when they tell people what political messaging works and what doesn't.

“If you ask somebody what they’re feeling, you're not going to get a very accurate response. Emotion is subconscious,” Gerrol said. “The idea is to measure emotion without asking.

“When people make decisions, it’s tempting to think there’s a lot of rational thought. That’s not really true. You can't have decisions without emotion.”

...

Scores of political prognosticators predicted Trump’s demise almost a year ago. They predicted that Democratic candidate Bernie Sanders would fizzle out.

Alas, no political prediction has rung true, leaving political professionals and junkies alike asking, “What gives?” and “What are Trump and Clinton voters thinking?”

1. First and most obvious, a minimum level of skepticism is required in these situations. None is to be found in the article.

2. There are huge causal and logical leaps here. Determining who a debate viewer supports based on biometrics shouldn't be that difficult -- hell, you could probably do a good job just watching facial expressions -- but Gerrol claims all sorts of insights about the subjects' decision-making process.

3. All based on 30 subjects. If you read the article, you'll see that Gerrol seems able to infer some important relationship from almost every line of the debate. That's a huge edifice for such a narrow base.

4. Let's stick with the 30 a bit more. There's every reason to believe we are traversing a rugged landscape here, with a definite possibility of interactions and non-linear relationships. If you have to disaggregate 30 subjects by gender, age, etc., you start getting some very small numbers.

5. Why do they always want to do politics? There are lots of choices (sometimes strongly held -- "Coke or Pepsi?") that are difficult to explain and predict, choices that are clearly emotional and often marketing driven. Voting is not one of those. We have pretty good models to explain the process which usually comes down to rational factors like social issues and economic interests. If you factor in what information the voters rely on, the choice becomes even more rational (if you believe what you see on Fox News, supporting Trump is a sensible decision).

6. As for this cycle being unpredictable... A lot of people in the journalistic establishment don't want to admit this but the people who got this campaign humiliatingly wrong did so because they argued against the data (see here and here). As far as I know, actual political scientists did fine.

7. Spencer Gerrol is a TEDx presenter.

How long does Trump stick around after the fun stops?

I'm always leery of attempts to speculate too much about the character and motives of presidential candidates, at least not in real time. There is some potential value when it's done in a historical context by someone like Rick Perlstein, but when done as part of campaign coverage the results are almost always worthless.

This is partly because most pundits are terrible at this kind of analysis, prone to groupthink, blind to their own prejudices, easily swayed by the most blatant of manipulative ploys and generally not nearly as smart as they think they are.  Mainly though, the topic usually isn't worth that much attention. Compared to questions of policies and competence, issues of character and psychological make-up almost always fade into triviality.

Until recently, the only notable exception was Nixon, and even there, I'm not sure real time analysis would have been that productive. It took a while for the full story to come out. With Trump, though, the emotional issues are so close to the surface and are so obviously driving the process that to ignore them is to omit an essential part of the story..

For example, with a normal campaign, whether or not a candidate is having fun is a secondary, if not tertiary, issue. It's true that the best politicians tend to love campaigning, but they don't make tactical, let alone strategic, decisions based on whether they're enjoying themselves.

With Trump, though, it is entirely appropriate to ask what will happen to the presumptive GOP nominee when the process goes from non-stop fun to no fun at all. I was planning to write a post on this but Gawker's Ashley Feinberg got there first and hit most of the points I wanted to cover.

Remember, Trump had a blast during the primaries. Back then, he was free to spew any sort of nonsense he wanted. And not only did no one question him too seriously, but as his discourse became increasingly unhinged and racist, his poll numbers rose in kind. The more his poll numbers shot up, the more media attention he got. And for Trump, there is no purer joy. If Donald Trump is able to buy his way into heaven, it’s just going to be him reliving the 2016 primaries every day for the rest of eternity.

Now, though, the Democrats are just about done squabbling, Republicans are out of distractions, and the cold, sobering reality of what our nation has wrought is finally settling in. Now that the fun is winding down, the small-handed prince of our country’s most base anxieties is going to start looking for a way out. He’s already laying the groundwork, saying on Fox & Friends that “it would be nice to have full support from people that are in office, full verbal support. With all of that being said, I may go a different route if things don’t happen.”

Feinberg then walks through the various scenarios for withdrawal. All of them are long shots, but at this point I'm not ruling anything out.

It's not "vibranium." Hell, it's not even a "hyperloop."

[Caveat: I've been getting up to speed on the Hyperloop and reaching out to knowledgeable people in the field, but I'm no expert and though I'm trying to be careful, some of the technical details may need to be revised later. On a related note, if you do see something wrong (or even not quite right), please let me know.]

From the Verge [emphasis added]:

Hyperloop Transportation Technologies (HTT) announced today that it will be using a new type of sensor-embedded carbon fiber to make its capsules, capable of transporting passengers through a nearly airless tube at speeds up to 760 mph, safer than ever. The company is calling this new material "Vibranium," which may sound familiar to anyone with a passing knowledge of Marvel Comics and its wildly popular Cinematic Universe.

In the comics, Captain America's iconic shield is made of a nearly indestructible metal called Vibranium. It is almost exclusively found in the tiny (and fictional) African nation of Wakanda, the ancestral home of the Black Panther, who had his silver screen debut this month in Captain American: Civil War — and will be starring in his own standalone movie in 2018. Or around the same time the first Hyperloop is expected to be in operation.

HTT's Vibranium, though, won't be used to make any superhero flair, but rather a dual-layer coating for the company's Hyperloop pod that will provide the passengers with twice the protection should anything damage the exterior. The company boasts that its Vibranium is "eight times stronger than aluminum and 10 times stronger than steel alternatives," which is fairly standard for reinforced carbon fiber. What makes HTT's version special is the embedded sensors that can transmit "critical information regarding temperature, stability, integrity and more, wirelessly and instantly." HTT unveiled a section of its Hyperloop capsule made of Vibranium at the Pioneer's Festival in Vienna today.

We should probably come back to this as an example of how these hype spirals mix comically over-the-top language with outlandish claims that are supposed to be taken seriously (Vibranium is explicitly meant as a joke. With the numerous Elon Musk equals Tony Stark comparisons, the call is quite a bit more difficult). Instead of the hyperbole, for now though, I want to focus on the vagueness of the language and the way it interacts with journalists' weak grasp of the topic.

Musk never provided a really good answer to why the Hyperloop would cost so much less than comparable existing structures did but he could make the case that the hyperlink might cost less to implement that other proposed vactrains.

Before we go there, however, it is important to step back and realize just how little distinguishes the Hyperloop from the hundreds of similar proposals that have been made over the past century. This is very much the stuff of a mechanical engineering major's senior project. There is a very real possibility that every major aspect of the plan has been arrived at independently before over the years but without the necessary PR push to get it noticed.

That said, the idea of having the pods use some of the small amount of air in the near vacuum to generate their own air cushions rather than relying on mechanisms in the track is quite clever. Though questions remain as to whether this can be made to work reliably on a large scale over number of years, it does potentially offer a substantial cost advantage over many of the other designs for similar super high-speed trains. As I understand it (see caveat above), this design greatly simplifies the construction of the track (keeping in mind that simple is a relative term when you're talking about a structure that maintains a near vacuum over hundreds of miles and reliable handles passenger carrying pods traveling in excess of 700 mph).

Which brings us to this:

Hyperloop Transportation Technologies, one of two LA-based startups working to build Elon Musk’s futuristic transportation system, announced today that it has licensed a technology called "passive magnetic levitation" to power its prototype. The system is "a cheaper, safer alternative" to regular magnetic levitation, or maglev, which is currently in operation powering high-speed trains in China and Europe.

Passive magnetic levitation, which was developed by the late physicist Richard Post in 2000, uses unpowered loops of wire in the track and permanent magnets in the train pod to create levitation. By contrast, maglev requires complex and expensive infrastructure upgrades, such as power sources placed at intervals along the track. Post, who worked for the Lawrence Livermore National Laboratory in Livermore, California, until his death in 2015, called his new system "the Inductrack."

For the record, Post's ideas are very cool. They might even be significantly cheaper than a standard maglev, but the system would almost certainly be more expensive than the pod-generated air cushion system Musk proposed.

To sum up:

1. HTT is not actually a Hyperloop but rather a maglev train;

2. The overwhelming consensus among independent experts is that the Hyperloop would cost at least 10 to 20 times as  much as Musk claims;

3. The HTT maglev will almost certainly cost more than the Hyperloop.

Red flags -- when contradiction becomes confirmation

Ariel Sabar as a great long-form piece up at the Atlantic profiling an extraordinarily disreputable figure  called Walter Fritz. If you have the time, you should definitely read the whole thing, but I wanted to highlight this:

On a humid afternoon this past November, I pulled off Interstate 75 into a stretch of Florida pine forest tangled with runaway vines. My GPS was homing in on the house of a man I thought might hold the master key to one of the strangest scholarly mysteries in recent decades: a 1,300-year-old scrap of papyrus that bore the phrase “Jesus said to them, My wife.” The fragment, written in the ancient language of Coptic, had set off shock waves when an eminent Harvard historian of early Christianity, Karen L. King, presented it in September 2012 at a conference in Rome.

...

On a more practical level, [King] couldn’t see how a con artist cunning enough to produce a scientifically undetectable forgery could at the same time be so clumsy with Coptic handwriting and grammar. “In my judgment,” she wrote, “such a combination of bumbling and sophistication seems extremely unlikely.” The crude writing, she argued, could simply indicate that the ancient scribe was a novice.

Yet “a combination of bumbling and sophistication” could well be the epitaph of many of history’s most infamous forgers, their painstaking precision undone by a few careless oversights.

Whether it's a con or just a conspiracy theory, if you dig into accounts of smart people falling for the implausible, you will usually find a point where the subject found a way of not just explaining away conflicting evidence, but of actually turning it around so that it supports the contention. Things never go well after that point.

Best pop culture reference by an economist

via Brad

Excellent post by Dietrich Vollrath. In particular, the discussion of the World Bank’s Doing Business index ("Apples and Oranges") is easily worth a thread. For now, though, I've got to share this.

From by Can we get rich by "Doing Business" better? 

Growth Economics with Nigel Tufnel

Below I’m going to get to the gory details of why the Doing Business (DB) indicators generally suck as a measure of anything useful. But let me start with this note. The DB index Cochrane uses is a “distance to the frontier” index. Meaning you get a number that tells you how close to best practices in business conditions a country gets. If you are at the best practices in all categories, you’d get a 100.

Cochrane says, and I quote, “If America could improve on the best seen in other countries by 10%, a 110 score would generate $400,000 income per capita…”. Stew on that for a moment. Think about how that DB frontier index is constructed.

Cochrane went there. He said it could go to 11.

This brings up the bigger and more important questions of how someone as smart as Cochrane can descend so deep into silliness and how little impact the descent has had on his reputation as a serious thinker, but those are topics for another day.