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tanderson92

2,308 karma · joined August 6, 2014

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tanderson92··on 9th Circuit holds that scraping a public website does not violate the CFAA [pdf]
Even twitter requires you to be logged in to view "replies" on a user's profile.
tanderson92··on Joi Ito Resigns from M.I.T. Media Lab After Outcry over Jeffrey Epstein Ties
Probably this as well is worth noting: https://twitter.com/xeni/status/1170352857952002048
tanderson92··on M.I.T. Media Lab concealed its relationship with Jeffrey Epstein
> You misunderstood my point completely. I'm not saying that the government's decision to give him a deal actually means he didn't do anything wrong. I'm saying that it likely appeared that way to many people.

This naiveté is undermined by the fact that the fundraisers themselves had very serious discussions about what to do if the women he insisted accompany him anywhere were being trafficked and wanted a way out. They knew exactly who this guy was, the story makes it perfectly clear.

tanderson92··on Health insurance companies are useless
You left out the rest of the sentence:

> "....and the more money flows to their bottom lines."

The reason is because their profits come as a percentage of what is paid, through the enforced Medical Loss Ratio[1]. There is a clear way to increase profits...

[1]: https://www.healthcare.gov/glossary/medical-loss-ratio-mlr/

tanderson92··on Robinhood raises $323M at a $7.6B valuation
This is why Form 8949 (column (f)) exists.
tanderson92··on Under pressure from regulators, Facebook is rethinking Libra's design
> Since FB is a US company does that mean every single Libra user will be subject to US restrictions - even those which are legal in their country? Will Iranians be able to use Libra? What about Canadians using it to buy marijuana?

There is a long history of non-US banks which have operations in the US getting fined by US regulatory agencies because they violate US law somewhere else in the world with regard to money laundering / sanctions etc. The reach of US prosecutory power with respect to financial institutions is vast.

tanderson92··on Strongest earthquake in years rattles Southern California
I was only a few miles away in San Gabriel and did not feel a thing; I wonder if the SGV blocked any of the waves.

Wish I had come to campus early today to feel that one.

tanderson92··on Staging That Scene from ‘Eyes Wide Shut’
This is incongruous with how the book ends — which shows the wife as finding the mask and leaving the mask on the pillow to indicate her understanding.
tanderson92··on Former Equifax CIO sentenced for insider trading
They had a duty to shareholders which they broke when they abused their position of trust within the company to hurt those shareholders by stealing information from the company and using it for personal gain.
tanderson92··on America’s Monopoly Crisis Hits the Military
More from this author on monopolies (and politics): https://www.theatlantic.com/politics/archive/2016/10/how-dem...
tanderson92··on Everything everywhere is securities fraud
If I may add a substantive counterpoint, this newsletter's use of ValleySpeak to talk about occasionally complex technical topics (as well as moving to SoCal, and also reading other more focused things like: https://web.stanford.edu/~zwicky/aave-is-not-se-with-mistake...) taught me that my youthful naive (and possibly unknowingly racially-tinged) ideas about language and communication were far off -- specifically that anything apart from the Correct English (TM) mode of communicating was inferior and a sign of poor education or intellect. This is important, because if we unjustly filter people by their dialect then we may be making significant Type-I errors.
tanderson92··on Hedge funds use satellite images to beat Wall Street
Source? I can quote the author's book on microstructure supporting my position that it is not something else entirely.
tanderson92··on Hedge funds use satellite images to beat Wall Street
Not all front-running is illegal, see this article which discusses a few examples, including quote matching and order anticipation: https://blogs.cfainstitute.org/investor/2013/04/24/what-to-d...

Front-running is very common in bond trading.

tanderson92··on Hedge funds use satellite images to beat Wall Street
> And given how difficult it is to define insider trading that seems like a pretty accurate assessment to me. Alternative data firms are the new expert network firms in the wake of Rajaratnam.

I fail to see the parallel with Rajaratnam, since Rajaratnam was accused and convicted of insider trading on the basis of leaking from corporate insider executives(!) That's precisely the distinction that is being drawn in the comments here, between theft of insider information and the acquisition of difficult-to-intuit public information.

To answer your question, these parts:

> But technology is increasingly blurring the boundaries between public and private information, creating data opportunities that are legal, but are expensive and often require special expertise to access. “Technology was supposed to level the playing field, but what I see is the fence separating sophisticated and unsophisticated investors growing higher,” says Patatoukas, who is passionate about teaching his students to analyze public sources of financial information and finds the trend troubling. “That’s the dark side of big data. Our evidence suggests that unequal access to alternative data leaves individual investors outside the information loop.”

> In the aftermath of the financial crisis, there has been increased regulatory interest in the role of informed trading and disclosure requirements to protect the fairness and integrity of capital markets. With this in mind, Patatoukas hopes that the paper will get the attention of the regulators. “In a market setting where the line separating public from material non-public information is getting blurrier, the question that regulators need to answer is: What is their role in terms of leveling the playing field for individual investors?”

tanderson92··on Hedge funds use satellite images to beat Wall Street
Parallel construction is only a thing that the government can get away with in prosecuting people, because the government has power and individuals do not.
tanderson92··on Slack Is Going Public Without an IPO – How a Direct Listing Works
This is still a market order (ignoring rounding).
tanderson92··on Fast constant-time GCD algorithm and modular inversion
Depending on how expansive your idea of the model of ‘computation’ is, there is this old paper: http://zero.sci-hub.tw/1814/0efc01f09f718e409481a47ff90e98fc...

TLDR: using optics for sorting

tanderson92··on ArXiv vs. SnarXiv (2010)
That's even easier: https://arxiv.org/
tanderson92··on The new Dropbox
SyncThing also gets this right.
tanderson92··on A Field Guide to Power Transmission Lines
From the end of the piece:

>Moving into the future, it’s hard to say how much more modern the power grid can get since the underlying principles are so simple: three phases per circuit and structures large enough to keep them from sagging into something that could cause a fault. There is a lot of talk of the smart grid, but the solution to most of the issues with the power system is often simply to build more circuits as the demand for electricity rises. It’s a difficult problem to engineer ourselves out of, especially with the increasing age of the power grid itself, and at some point is simply becomes a numbers game of how many watts can be moved from place to place.

Technological progress could change the landscape quite a bit: https://en.wikipedia.org/wiki/Space-based_solar_power

tanderson92··on Teenagers campaigning for Mike Gravel on Twitter
We could also just designate a limited number of people as politicians’ voice, who speak for him. We could call this new job, I don’t know, “spokesperson”?
tanderson92··on Teenagers campaigning for Mike Gravel on Twitter
Calling out the hypocrisy of top-tier candidates like Biden or Harris with the same panache as in 2008, while advocating policies not considered ‘Practical’, is their explicit goal. Some people view the 2008 performance as brave truth-telling—how many of those serious, smooth-talking candidates voted for the Iraq War?

Speaking truth to power doesn’t always mean speaking truth to people with elected power.

tanderson92··on Make School Hard Again
Very interesting, thank you! This discrepancy I cannot explain, and will have to investigate further. It appears the answer changed in the 2005 CDS, see: http://finance.caltech.edu/Resources/cds

(of course, for those following along, this very interesting point is unrelated to the college admissions scandal)

tanderson92··on Make School Hard Again
Despite the Chronicle's attempt to lump Caltech in with other elite schools in not explicitly having policies which forbid this from occurring, it is nonetheless impossible as pointed out in a Q&A done by the Chronicle with various institutions.

See: https://www.chronicle.com/article/We-Asked-20-Elite-College/...

> Q. Will your university exert more oversight over how students are designated as athletic recruits in the admissions process? If so, how?

> A. Caltech does not reserve admission spots for our athletic department nor do we take into account legacy status or family wealth. The main criteria in our evaluation process focuses on academic and personal performance/potential as well as demonstrated STEM passion and achievement.

> Q. Does "Operation Varsity Blues" show a broader need for reform in selective admissions?

> A. This case is an important reminder how hypervigilant selective admission offices need to be in evaluating candidates and their credentials.

tanderson92··on How Screwed is Intel without Hyper-Threading?
https://make-linux-fast-again.com/
tanderson92··on Letter from an “Anti-School Teacher”
It's a bad-faith fallacy because the OP's point holds even if the playing field is level and the state doesn't have an advantage in any other component than the stated one (time). The bad-faith comment (yours) instead reversed it, implicitly claiming the state was negatively positioned with respect to factors other than time, and pretended that was the OP's argument.
tanderson92··on Quants Think Like Amateurs in China’s Wild Stock Market
The excerpt is from this SSRN preprint, section III: https://papers.ssrn.com/sol3/Papers.cfm?abstract_id=2790606

The fund went up not down. That aside, I believe the point is that if a bot goes and does that, it is simply doing what a human told it to do; bots reflect the commands of their human masters in an environment (financial markets) created by and for human endeavors. Hiding behind "bots" is not a way to get insight into mechanics of how markets (mal)function, IMO.

tanderson92··on Quants Think Like Amateurs in China’s Wild Stock Market
Yes, and it's a worldwide phenomena. Embedded in this link is Thaler (A Nobel winner) using such an example as a counterexample to one view of the efficient markets hypothesis: https://ftalphaville.ft.com/2017/10/09/2194613/thaler-the-cu...

tl;dr price for the "CUBA fund" spikes following Obama announcement of normalizing relations, despite the CUBA fund having nothing at all to do with CUBA.

tanderson92··on The Notion of “Trolling” in Ancient Sanskrit
On a slight tangent, has anyone ever looked into the etymology of the modern term troll? There hasn't been too much serious scholarship that I can find on the term, seemingly arising in mid-1980s newsgroups. But, I did find this which is my current best understanding; I also read in an old student newspaper edition that it refers to the trollish inhabitants underneath Bridge building on campus. From an Oral History of Caltech:

> ERWIN:Could you perhaps tell about bringing back A Broader View with its sequel, the new sequel? Because I think that’s very interesting. CLARK:Well, that was fun to do. The play readers group in 1987 decided to renew the play-reading party, which was one of the great traditions of the fifties and early sixties. And Bob Oliver asked me if I’d dust of f A Broader View. Well, I looked at it and I thought of updating it. But the shift in the twenty years had been so much that updating was impossible; it’s just a period piece or nothing. So we had to do it unchanged. And then I felt honor bound to write a sequel to it, which is called Troll’s Progress. The theme of it is that the essential Caltech never changes. It’s firmly founded on terror. [Laughter] And no froufrou can disguise that fact. And people who play together pray together, twitch together, stay together. Anyway, that theme allowed for a number of wisecracks, and I like to think the dialogue is rather funny. The kids who did it were tremendous. The undergraduates, of course, we know are stars.

> ERWIN:What was the origin of the troll?

> CLARK:Well, that goes back into Caltech history. And it’s probably Caltech’s only contribution to American culture. [Laughter] If you have to ask the meaning of the word, you’ll never understand what it means. But to put you sort of in the framework—that’s discussed, incidentally, in the dialogue of Beautiful Beckman there’s a segment on that. But a troll is a very high-voltage nerd. It used to be he lived “under DuBridge.” The kid that never sees the light of day, really, he’s so busy with his books. There are apprentice trolls at other schools, but ours are an order of magnitude more trollish. People who are compulsive and pathological students are much more so here. > ERWIN:Somewhere you referred to this as a “random troll.”

> CLARK:Oh, that’s the worst thing you can be called. You see, it means you’re just like a number; you have no personality. You might as well be a computer—nothing to distinguish. Oh, man, when you’re a random troll, you’re beyond the pale. [Laughter]

> ERWIN:In A Broader View, you called the Caltech undergrad “intellectually brilliant, emotionally immature, culturally deprived, and socially gauche.” And then, immediately afterward, I believe you gave the Caltech professor the identical description. That brings us to the point of what the shows were for underneath it all.

Source: http://oralhistories.library.caltech.edu/95/1/OH_Clark_K.pdf

tanderson92··on Slack Says Board Member Made Unauthorized Comments to CNBC
This is a good point.
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