skysight-inc/HackerNews huggingface dataset:
Dark pools didn't start off as a bad idea.

Their purpose was to allow big institutions to "hide" their block orders. Previously if an institution wanted to trade a big block, it had to break it up via a VWAP or POV algo and trade it over the day or to go to a sell side institution to find a buyer, in which case the broker would take a commission that is often 10x what the regular DMA commission would be.

To be fair, this is still what most buy side firms do these days. Dark pools really haven't helped much in this regard as many funds now just bypass them when they can.

> Meanwhile, Barclays was advertising LX to high-frequency traders by offering them more information, lower fees, and faster connections than it gave to institutional investors.

This is the basis of problem here.

A dark pool doesn't publish a bid/ask like other exchanges do. The idea was that everyone would be on equal footing wrt the information present. It appears as though Barclay's has been giving HFTs additional information, including the bid/ask spread in some cases, which totally defeats the purpose of having a dark pool to begin with.

The reason they did thsi is that there probably only needs to be one dark pool for the entire US, but each bank realized that it could make some serious money running their own, the only problem is that now you have the same problem as any web 2.0 market place startup does.

"How do you get the buyers and sellers"?

The HFTs started offering the banks boat loads of money to have access to the order flow in their dark pools if the bank reached certain thresholds of flow. To get to the required flow the banks started routing as many orders as the could, keeping RegNMS in mind, to their dark pools first before settling the orders on other exchanges.

I've been told with a straight face by some sell side brokers that I could not tell their SMART order routers to skip dark pools when trying to send my order to the market, again RegNMS excepted. It wasn't until we stopped trading through them that they relented and allowed us to by pass their dark pool.
I'm not sure how the answer to that question is relevant to the comment you're replying to.
The CoreOS revolution continues as the startup takes $8M
That seems dubious. There are a finite number of cars you can get on the road at a given speed. If the total travel time is roughly a constant as this article implies, autonomous cars will be equivalent to adding a few more lanes, meaning there will be no long-term change.
Influential Papers for 2013
Well they tend to focus on one road at a time, either ignore the feeders or the effect the newly expanded feeder has on surrounding roads.

Common around where I live is expanding two lane roads to three lanes and going back to two the closer to the city you get.
That's the wrong way to think about it. Credit isn't something you just get when you need it. You have to build it so it's available when you want to use it, this takes time.

Through high school and college I had a credit card that started out with a $150 limit and grew to around $800 or so. I used it for books and other small stuff. By the time I bought my first home at 21 my credit score was in the mid-high 700's. By the time I was in my mid-20's it was around 800.

I'd have had a harder time and higher rates if I hadn't established my credit early.
Building a city from scratch and designing it primarily with private automobile traffic in mind is a textbook case of Doing It Wrong. The only sane approach would be to build a subway (or maybe streetcars that have right-of-way) and then stick a city on top of it.
I'd like to see the Scala version numbers be based on Java versions.
The early-2000s carpetbagger exodus was very obvious.
I'm not sure where they got their data from, but one thing stood out to me.

I compared the price from Vancouver BC to Seattle WA and was surprised to say that food was cheaper in Vancouver, as Vancouverites are always coming south of the border to buy their groceries. Especially milk, which they load up on by the cart full. On this site though it says a liter of milk in Vancouver is $1.65 and a litre in the US is $2.90, a GALLON in the US can be bought for less than $2.90.

So I'm a little suspect of the data.
These are really cool! However I wish some of them animated a little slower or let me select a section to animate at a time.
What's the Optimal Number of Immigrants?
You're right: the submitted title ("Indian Space workhorse PSLV delivers again") was badly editorialized. Submitters: doing that violates the HN guidelines. If it's necessary to change a title (because it's linkbait or misleading), please ensure that the title is accurate and neutral.

In this case the content itself has changed as the satellites were launched, so we've updated the title again.
It would be cool to track some history / time spent on different things. As it stands it does not seem differentiated enough from the native timer (or a watch, for that matter).
I know this sounds crazy, but I don't want to buy in CA because we're running out of water. There seems to be no long-term solution besides the desalination of ocean water.

There are towns[2] in California here people have paid off their mortgage, yet might not have running water in a year.

[1]http://www.mercurynews.com/science/ci_25013388/california-dr...

[2]http://www.newsweek.com/what-happens-when-town-runs-out-wate...
They were leaving before it was cool.
To me it's not that it's newsworthy or not, but how it's presented.

It's not that Americans/Europeans can't do what the Indians did, but that we're not interested in doing what they did. The article seems to confuse the two.
Yeah, you shouldn't need credit for anything but a house(or if you're in a REALLY tight situation and need to finance a cheap used car to avoid endangering your livelihood).

People like to trash on Dave because he's religious(and very vocal about it) but I view it like AA/NA/etc(i.e. whether or not you believe the religious part seems to be unrelated to the positive effects of "working the program").

I think he's great.
The problem is that Western culture, particularly the Anglophone subset, is generally against sleep, equating the pursuit of adequate sleep--which vaies by individual--with sloth or laziness. A sleeping person is very obviously not working.

Through two acquaintance connections, I know someone who was assigned night shift work, and then was fired for falling asleep on the job in the first month. The employer made zero accomodations for the fact that he has human employees, and that he put them into a constant state of war with their own bodies to get his money. Pilots have to enlist the aid of regulators and unions to get their airlines to recognize that pilot fatigue is not the pilot's fault.

I suspect that this attitude was probably influenced by Anglo racism against Hispanics, targeting the midday siesta custom. It is somewhat telling that to get an Anglo to sleep around midday, you have to rebrand it as a "power nap", and sell it as a late-day productivity booster.

People in our society can advance to positions of greater authority by sacrificing biologically important things like sleep, leisure, and companionship and temporarily compensating with drugs like caffeine, cocaine, and prescription stimulants. Then they reach their acme, get the executive position, and resume normal work and sleep patterns while pretending to themselves that they could still work 120 hours every week. Then they reason that since they were able to achieve greatness by temporarily sacrificing a lot of sleep, everyone should be able to do a little better by sacrificing a little permanently. They don't particularly care about the science, since they have firsthand knowledge of their own meteoric rise and subsequent success.

Everyone else is stuck trying to defend against continual encroachment on the 40-hour work week, and they are forced to sacrifice sleep by necessity rather than by choice.
That's not the whole picture. The article doesn't directly mention the economic benefits from more people being able to access an area. My guess is that it works something like this:

Let's say you change a 3 lane road to a 6 lane road, and double the capacity. While some people from nearby roads will decide to start using the new road, a lot of increased usage over time will come from the new development that's made possible by the improved capacity. Strip malls will open up, new subdivisions or condos will go in, business centers will open, etc. Which is all fine, but it means that ultimately road usage will increase until some pain-of-driving threshold is reached, at which it'll level out.
Sigh, I suppose we're supposed to feel outraged. Believe it or not, other industries have faced their share of exploitation too.

Software development, at its lowest level, is a new form of labor. It's only natural for the economy of the world to search for the next big source of labor which can be exploited for cheap development. The market is also experimenting with different schemes and mechanisms by which to exploit. Let's not act surprised- what we do is not incomprehensible magic; the labour situation is fundamentally the same as every other industry. Software is new though, so it will take a while for the global economy to figure out just who and how to squeeze, in order to harvest that sweet sweet software juice. Lets just say globalization has its consequences.

If you're living in the third world and you can code for work, you're probably doing better than most people in your area, who are likely being exploited for their physical labour or worse. We should feel outraged for those living in slave-like working conditions. Lets talk about ending that. What we're seeing here is just a tiny side-effect of economic development; lets try to address the worst.
Having a high credit score gives you an advantage that most underestimate. Whether you're competing for an apartment, a job, or anything else if you have an 800 credit score and the other person has a 550 credit score, you win.
Has anybody seen any specs on these? Weight? Number of batteries? Solar panels?
There's definitely way too much crankiness in the software world, and I don't think it's because the people are naturally negative people. It's because we're pragmatic people and we unconsciously gravitate towards the styles of communication that get the most results.

Interesting. I'd gotten the impression that negative comments were a form of dick-waving. I.e., if you can spot the the numerous flaws in some tool or concept then you are clearly the superior-minded hacker.

But I've never thought about it in terms of idea adoption or whether positive comments might have a lesser effect on people.

I wonder if negative comments play off people's fear of being wrong or fear of being seen on the "losing" side.

Maybe if you hear that there are good points for both Dreamweaver and [emas|vi|sublime] and it's a matter of personal preference and what works for you, then it's just some bit of data to file away. OTOH if you hear that Dreamweaver is simply evil and profoundly flawed then your adrenaline spikes; you don't want to be one of those people who use that tool.

Kind of disappointing if true.
Betalist features Proximity 5 iBeacon Platform
Please add the function to see music sheet alongside guitar tab. It will be a great help for any serious guitar learner.
I always try to get 8 hours a night no exceptions. I gave up caffeine 2 years ago and really haven't needed it. Many of my colleagues get about 6 hours a night and tell me they feel like shit. That said, my PI is one of the rare people who only needs 3-4 hours a night and the guy has published over 500 papers and has read nearly everything published in or tangentially related to neuroscience. On average he probably gets and extra day of productive time a week which is a huge advantage.
I just sent a message to him about this HN thread but you are always free to contact the author on their own site. He is one of the top cryptocurrencies experts right now and is engaged in many different threads/sites at the same time.
Late reply, but yes I am reasonably sure.

A big part of one of my previous jobs was setting up Windows and Linux servers and linux workstations. The severs invariably had 4 nics.

I never, ever had to adjust iptables on any if them. Setting them up is mostly a breeze except for application specific stuff ($$$ stuff, not open source).

I don't know what distro and hardware you used though.
It probably would take too much effort to make it usable without Google's internal APIs (storage, search, etc).
buy a car and pay off the loan
I think we are very good as individuals, but we fail collectively. That is why even the poorest Indian home will be clean, but the wealthiest public street could be dirty.
Hmm. Transit in SLC isn't "fundamentally urban". Also, SLC doesn't have a very large black population.
I just woke up from a mid-afternoon nap and read this. What a lovely co-incidence.
Tony Schwarz is still the ultimate when it comes to productivity. I first came across his material when watching Eben Pagan's "Get Altitude" seminar, and I have to say, what he said in that video was life changing. I've since seen the video a number of times. I don't think there's anyone else out there that explains it -- or even gets to the crux of the points -- like he does.

I've implemented many of his ideas over time (his book is good, but I still found the seminar to be better).

- Avoid multi-tasking. Anything that is an interference will reduce productivity
- Create more physical energy by expending it
- Be mindful of your emotional and spiritual energy. It works like a pyramid.

I'm not as disciplined as some of my friends who I watched this material with, but I will say, it's had a great impact on my life.

This whole idea that you need to work into the night, or around the clock is absurd. Our bodies aren't made for it.
This thread's queue for useless bikeshedders is full, sorry.
Right, the problem is that Star Trek isn't even a useful jumping-off point.

This article is "link-bait gone wild". Calling the article "The Economics of Star Trek" is valid in that the Star Trek setting is supposed to be post-scarcity. But that's about where Star Trek's usefulness disappears.

They don't even take their ground assumptions into account in either their background setting or their stories. (Most of the intrigue in the episodes is conflict over resources (unless it's the "Prime Directive" which is even sillier). Why do the Klingons want this planet?)
I highly recommend skipping anything co-signed. It is a personal choice, but that puts you in a position of indebtedness just when you are starting out on your own. You don't want to owe for something before you even get started.

I bought a CD for $1000, and secured a credit card with that through the same bank. It worked out better than a 'secured' credit card because I made some interest.

CD Rates are different now, but it still works out better than secured.

I had to do it secured because I had a $78 water bill that a roommate forgot to pay on my credit from 3 years earlier.

Which reminds me of something else, try to get past paid off debts removed if that is hurting you. Sometimes they will do it, depending on your story.
This is a good summary of a typically rational article by Matt Levine. His entire commentary on the industry post-"Flash Boys" is similarly enlightening and balanced.

There is a striking parallel in the futures markets: Their original role was to help farmers hedge their risk of bad harvests by setting a fixed price for future delivery of foodstuffs. That market overtly and explicitly requires that there be hedgers and speculators, otherwise - no trade. Dark pools are no different, for the reasons you nicely outline above.

You could argue that what Barclays really should have done was channel some retail flow into LX, but sources of that kind of unlimited, innocent liquidity get snapped up pretty quickly.
What's wrong with desalination? Israel does it: http://www.haaretz.com/life/nature-environment/1.596270

And San Diego will too, soon: http://carlsbaddesal.com
Does it produce Android-friendly classes?
Why does he have to pay for the space? The Federation is post-scarcity. Surely space is free. If space on DS9 is scarce, then how is it allocated? Fiat, apparently.

Star Trek doesn't bear up to any economic analysis. It's not even worth trying.
Articles like this should have "expiration dates." Everything in there was true at the time, but past performance is not always an indicator of future performance.
Agree that the girl part should have been left out.

Still think an average hn-er should be able to type faster and more correct on a normal keyboard than the average 13yo, regardless of gender.
I have listened to it. It was interesting but it was disappointing at some moments. It is interesting how conspiracy theories work both for and against his position (I will take it as irrelevant for discussion). It is interesting how some of his facts are poorly investigated. E.g. he mentioned EPIC (http://en.wikipedia.org/wiki/European_Prospective_Investigat...) but EPIC found only that regular consumption of PROCESSED meat increases the risk of cardiovascular diseases and death from cancer. There is no correlation between unprocessed meat and those health problems according to EPIC.

BTW I'm from Europe and sometimes I visit USA. Food in USA is usually bad and usually accompanied with bad eating behaviors. You can get good food in USA but it is expensive and hard to find. I can see how changing diet to vegan/vegetarian can improve health if you are living in USA.
"Which in Python would become ... assert product(a, b) == 6"

Python's got a lot more capacity for "DSLs" than it may immediately seem. Writing "it.shouldBeEqual(product(2, 3))(6)" would be quite easy in Python, actually; it's got all sorts of overloads and you can return all sorts of excitingly overloaded values. You don't see it because it isn't considered "Pythonic", not because Python can't do that.

(And I'm with Python on this. Those "fluent" APIs spend way too much effort being cutesy and verbose and not enough effort being simple, transparent, and composable. It looks good in the common case but when you write good test code it stops looking so good when you're writing map(it.shouldBe.eq, testTable), and the fact that the cutesy "fluent" style takes even a baby step in the direction of discouraging anything like that is an immediate disqualification in my book. Oh, don't try to defend it by saying you can still do the map I said... I've got enough experience in such things myself to know that it's actually a bigger problem than I'm making it out to be, not a smaller one.)
Thanks for this; it's a valuable concept I couldn't have articulated before. It seems I see stroads everywhere, and they do suck for pedestrians, cyclists, shoppers, businesses, and humans, but there isn't an obvious way to get from here to the improved future. At a certain population density, land simply is less valuable, no matter the road organization. I can imagine a town trying (and enforcing!) the street concept in a couple-block area, but how effective can that area be when everyone drives to get there? I almost suspect we'd need regular bus service, but at low population densities how does that work?
>' You just don't remember how different is it to sleep longer.'

Exactly.

Not too long ago the combination of child, work and school forced me to completely re-evaluate how I was spending my time and what is actually important to me.

One big change I ended up making was getting to bed at the same time every night and clocking a consistent 8 hours.

Within a week or so the difference was remarkable in both my mood and acuity through the mid-afternoon - ideally I'd take a 45 minute nap around 13:30, but that's not an option with my current job.

In order of effect, the best things I've ever done for day to day clarity:

1.) Going to bed and rising at consistent times with 8 hours inbetween.

2.) Drinking plenty of water. At least 8 ounces per waking hour for me.

3.) Regular exercise. I feel best lifting weights 3 or 4 days a week, but I expect the specifics are less important than simple movement and exertion.
Methods aren't closures in Ruby (though we have procs and lambdas for that), but you certainly can pass methods around. Methods are objects, as are unbound methods. Both of them can be passed as arguments or returned as values. That's the definition of a first-class object.

You don't see the pattern often, as it's far less idiomatic than passing procs as a block, but you can do it.

Also, def is an expression in recent versions of Ruby. I don't remember exactly which version introduced it, but def returns the method that it created.
Bowei from the World Startup Report team here. Thanks for reading the report.

If anyone has any question regarding Brazil startup ecosystem, I'd be happy to help answer it!
I agree completely with everything you just said, except...

Except that I've seen it happen. The only thing I can think is that all the costs you describe are pushed to another group in the corporation.
Nigger! Learn what a phase locked loop is.

http://en.wikipedia.org/wiki/Phase_locked_loop
It's been some years, so I don't recall exactly, but this is probably correct. Nevertheless, the point remains: my inadequate credit score mucked with my options here.
Elapsed time does not change, but the current time is. We measure elapsed time based on a presumably stable measure -- the vibration of cesium under exposure to microwaves -- but we want 'now' to be based on the earth's rotation and location with respect to the sun, which is gradually decaying. Atomic vs Astronomical time.
I saw an ad for Go programmers in a taxi once...
Honestly, if I had to choose between things I'd like to have in Python that exist in other languages, I'd choose improving the protocol supporting comprehension syntax improved to be more general (like Scala's) over blocks.

While blocks are nice to have, I've yet to see a good proposed syntax for them in Python.
Loans are also bad because you start with a 100% full credit (e.g. $1000 outstanding on $1000 loan) and pay it down. Part of the credit rating is your balance to credit ratio, so 5% looks much better than 95%. I've heard that the ideal is <30%
Super-expensive and massive energy requirements. Its the least efficient way to produce water. Also produces brine-salt waste which is nasty to process or dispose of.

http://en.wikipedia.org/wiki/Desalination#Considerations_and...
Wait, you had me until the last 2 paragraphs.

The whole point of Levine's article is that HFTs did not offer the dark pool operators "boat loads of money". The dark pool operators gave the HFTs sweetheart deals to induce them to trade in their pools. They didn't do that because the HFTs paid them. They did it because without the automated traders, the dark pools wouldn't have worked at all.

By the numbers, if the big institutional investors wanted HFTs out of the dark pools, Barclays should have kicked them to the curve. Not ethically, but simply from a practical business perspective. But Barclays couldn't do that... or, they could, but then the institutional clients would have stopped trading in the LX pool, because they'd never get filled.
Parent "Struggle[s] to feel bad for institutional investors" as if this was a class of whiney rich people who's money was under threat. It's not of course; it's mutual funds and pension money - our money.

Let me expand a bit: dark pools exist because of an asymmetry in the public markets caused by their fragmented structure. Those money mangers recognized that, so they sent flow to a place which was explicitly marketed as a tool to mitigate that asymmetry.

Contrary to the parent's post, transaction cost analysis is not an especially exact science and the tools available to fund managers are not particularly helpful or well-integrated. Their sell-side partners are not overly invested in helping them either, since they have their own issues (intense cost pressure, declining flow, regulators everywhere...)