jplewicke

11 ms·

61.
by jplewicke 15y ago
On the other hand, if you can eventually measure long-term value and you can keep track of users over a long enough cycle, then you can eventually run an A/B test on long term value. This depends on accurately tracking users, having a qua
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by jplewicke 15y ago
Previously discussed at http://news.ycombinator.com/item?id=1277004 , with some good commentary on simulations of various stopping rules.
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by jplewicke 15y ago
Even better, there is a major effort underway to legalize investing in startups by anyone. A bill (HR 2390 ) has already passed the House, and there's draft resolution in the Senate that would do the same thing. The main limitation will b
64.
by jplewicke 15y ago
The first thing that comes to mind here is the enormous red bullseyes that Target puts on top of all of its stores. They're visisble from airplanes and satellites, but their symmetry would make them less useful for calibration. An example:
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by jplewicke 15y ago
Thank you.
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by jplewicke 15y ago
I know it's an easy analogy to reach for, but I wish that writers would think twice before comparing some trivial inconvenience to being raped. You may have just ruined the morning of a survivor of sexual assault. There are dozens of other
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by jplewicke 15y ago
If anyone else is wondering how to do this on Heroku, http://stackoverflow.com/questions/6179398/how-can-i-use-a-s... seems to be the canonical Stack Overflow question. I'm going to try the Rack::ReverseProxy suggestion myself sometime s
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by jplewicke 15y ago
You can get names and Facebook IDs of user's friends for anyone who signs in with your app. I don't believe you can fetch their friends through the API, so the game companies should have access to only edges in which one person uses a game
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by jplewicke 15y ago
My major concern with using a former nuclear missile silo would be that it's hard to know whether Russia's intelligence service knows that it's been deactivated. The odds of of a nuclear exchange with Russia are low, but I'd prefer to know
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by jplewicke 15y ago
They're also going to be selling off real-time feeds of per-company sales data to investors: MasterCard has launched a new product for investors leveraging its huge global panel of transaction data from over 1.7B cards. This panel is global
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by jplewicke 15y ago
I work for a quantitative stock trading firm, and if this data is an effective predictor of stock returns you are underpricing it by a factor of about 4x to 25x. Most data providers charge at least $10,000/year, with the more effective one
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by jplewicke 15y ago
There's a tool on Erwin that allows you to jump to random categories. I have my homepage set to random Featured Articles: http://toolserver.org/~erwin85/randomarticle.php?lang=en&#38...
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by jplewicke 15y ago
Boston, MA (not remote) MDT Advisers - We're a small quant investing fund working with: - machine learning - discrete optimization - C - large datasets You can find a job description at http://www.mdtadvisers.com/careers/qea.jsp . The peo
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by jplewicke 15y ago
When I read this article, my first thought was that this would make a great option in a/bingo. UCB1, which is one of the bandit methods discussed in this thread, looks like it'd be relatively easy to implement: you just calculate a simple
75.
by jplewicke 15y ago
Boston, MA (not remote) MDT Advisers - We're a small quant investing fund working with: - machine learning - discrete optimization - C - large datasets You can find a job description at http://www.mdtadvisers.com/careers/qea.jsp . The peo
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by jplewicke 15y ago
It seems to be based off an anti-spam heuristic run by Cloudflare: https://www.cloudflare.com/ . The most insulting part of it is that they offer to link to evidence of what your IP address has supposedly done, but don't actually provide
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by jplewicke 15y ago
I wrote a peer-to-peer credit server in Neo4j and Ruby: https://github.com/jplewicke/rivulet . There were two reasons I used Neo4j: I needed to be able to quickly find paths to route payments along, and I needed to be able to update prope
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by jplewicke 15y ago
Google can and does include a Javascript interpreter in their crawler: http://www.seomoz.org/ugc/new-reality-google-follows-links-i... . They don't need to solve the halting problem in order to run a Javascript interpreter for a certain a
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by jplewicke 15y ago
It'd be cool if they added an option to subscribe for $10/year for a quick SMS and email notification if your account is compromised. I'd get it for myself and my family.
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by jplewicke 15y ago
That's interesting -- it looks like news.arc automatically removed the "%27" from both of our URL submissions, maybe as an over-zealous anti-spam precaution.
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by jplewicke 15y ago
Londsdaleite futures, actually: http://en.wikipedia.org/wiki/Lonsdaleite :) I was originally talking about trying to get currently profitable trading strategies out of the same pieces of accounting information that millions of smart compe
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by jplewicke 15y ago
Boston, MA (not remote) MDT Advisers - We're a small quant investing shop working with machine learning, financial analysis, and the hardest dataset in the world. We're mainly hiring for a general analyst position that’s about 60% programmi
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by jplewicke 15y ago
I agree completely if we're talking about a recommendation engine that's supposed to always be able to find something of immediate interest for you. However, that problem is at least as hard as building a general AI, since not even my frie
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by jplewicke 15y ago
Except for when it's not. According to the linked article, their business model is that they'll help protect you from the patent trolling of larger companies. For example, if you pay them $X,000 a month and you get sued by Microsoft for p
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by jplewicke 15y ago
There seems to be a major divide between two-syllable non-meaningful words and three+ syllable ones. Etsy, Zynga, and Google don't sound that hard to remember compared to Wesabe or Geezeo. I suggest a simple test for domain name desirabil
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by jplewicke 15y ago
The only place I really miss having them is in older articles and on searchyc.com. I feel a much greater compulsion to engage each comment on its merit when voting and when reading, and I feel like reading HN has become more intellectually
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by jplewicke 16y ago
Strangely enough, Groupon was originally a startup named The Point trying to save democracy: http://www.thepoint.com/ . Andrew Mason, Groupon's CEO, was pretty psyched about a campaign to build a giant dome over the city of Chicago: htt
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by jplewicke 16y ago
I had to do an IQ test when applying to a hedge fund in LA: Madison Tyler Holdings / http://www.ewtcareers.com/ . I'm not sure if they'd talked to legal counsel about it, and I've never seen it anywhere else.
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by jplewicke 16y ago
Boston, MA (seeking interns, not remote) MDT Advisers - We're a small quant investing shop working with machine learning, financial analysis, and the hardest dataset in the world. We're mainly hiring for a general analyst position that’s ab
90.
by jplewicke 16y ago
The quant trading shop I work for in Boston is: Boston, MA (not remote) MDT Advisers - We're a small quant investing shop working with machine learning, financial analysis, and the hardest dataset in the world. We're mainly hiring for a gen

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