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Monday, November 11, 2013
To Save Itself, The DSLR Market Should Look To Smartphones And Revalue Each Press Of The Shutter
Microsoft Starts Taking Office On The Web Seriously
Year Up Helps Give Urban Youth The Training And Connections They Need To Land Hot Tech Jobs
Instagram Is Down For Some Users Due To ‘System Issues'
Yale Adds Another Stop To The College Hacker Circuit
The organizers of the hackathon at Yale this weekend aren't exactly sure how many students turned out for the sleepless grind. Gauging from the depletion of YHack t-shirts, they put it at about 950.
That's about 915 more people than came last year, when a group of students organized a mini-hackathon that one participant described as, “Wasn't great.”
With about 150 participants making the haul from Canada, a handful flying in from England, and hundreds more arriving from schools across the US, the hackathon that wrapped up this evening was definitely better than that and adds one more event to the circuit of major college hackathons that includes PennApps, MHacks, HackMIT, and HackRU. In the spirit of building the intercollegiate hacker culture, a number of the organizers of those events also came out to help at Yale this weekend.
A large part of the motivation to hold a major hackathon on campus is to build a brighter, more cohesive programming environment on Yale's campus. Projects are fractured among the student body or limited to problem sets for class, said Frank Wu, a sophomore and one of the YHack organizers. As far as post-grad career choices go, working in tech is not high up on the list.
This weekend's hacks were pretty awesome across the board, and the littered pizza boxes were many. Here are the winners and finalists, as presented at this evening's closing ceremonies.
Winning hack: Rainman
Created by two Yale seniors, Rainman gives context to news articles. It's a major help for those times when you want to educate yourself about, say, Syria but don't want to toggle between the story and a few reference tabs. The Rainman Chrome extension pulls up relevant Wikipedia articles as a sidebar to the main story. Those articles are pulled based on the keywords in the article, comparing the frequency with which a word appears in the piece to a larger corpus of articles. It's the type of hack that would be incredibly useful in real life and gets at how we read news articles now, in conjunction with other reference materials.
Second place: Lux
Lux deals with the issue of indoor fluorescent lights that mess with your internal clock and keep you awake long after you've tried to go to sleep. The Yale-based team's idea is that lightbulbs should be smarter and change hue and brightness depending on the time of day with no prompt from the owner, although they can also be controlled with an app. It's like f.lux for real life.
Third place: cHat
Retro in the best way possible, this hack uses a text interface as a replacement for video chat services that often freeze up. Imagine a wall of text that creates a pixelated, black and white video image and you've got the idea. Text is a simple way to get data across, and as the Carnegie Mellon students who made it said, “The bandwidth is, like, zero.”
The other finalists included Leaf, a Pebble-based hack that uses handshakes as a way to swap contact information at networking events; Hacksearch, a Facebook graph search that lets you include fields that don't exist, like popularity and attractiveness; Subtle Glass, an Android app that translates spoken word into text using Google Glass; and Laser Lock, which makes data transference possible through LED light.
It's worth noting that the kids on the Laser Lock team MacGyvered part of the hardware for their hack using foam rockets that YHack was giving out as swag and a bunch of Doublemint gum wrappers. And it worked.
How Mobile Alters Traditional Network Effects In Marketplaces
On the web, marketplaces are the stuff of legend. With properties like eBay and Amazon, among many other, an online marketplace harnesses the openness of the web, more efficiently matches supply with demand without too many intermediaries, and leverages network effects to capture economic value during each transaction. A key component for a marketplace to work, however, is liquidity - the comfort in knowing that for each item or request posted, there is a willing buyer at a certain price. Liquidity is what drives the engine of a marketplace, what keeps sellers coming back to list items and what keeps buyers coming back to fulfill their needs, and in order to have it, it requires scale - that lots of people be able to access the marketplace.
Investors love marketplaces for obvious reasons: the power and elegance of network effects. I've personally had the opportunity to invest in three so far, and am hoping for more. Yet, even though I'm focused on mobile for work, mobile presents would-be marketplace startups with some thorny issues out of the gate, largely because of fragmentation of users across two dominant mobile platforms (iOS and Android). Early-stage startups often do not have the luxury of time or money to build across mobile platforms at the outset, so any mobile marketplace offering would theoretically be reducing its overall size by about 50%, and this affects liquidity of the marketplace. (There are some startups, such as Threadflip and Tophatter, as examples, which began their marketplaces on the web with an eye to convert to mobile. This can be a controversial approach - using the web to hack mobile distribution - though some, like Rothman, suggest it's a sound path in order to get mobile marketplaces going given general app store distribution woes and the liquidity issue facing mobile marketplaces.)
Of course, a few mobile-first startups have cleared the liquidity hurdle presented by the fragmentation of users across iOS and Android. For example, companies like Poshmark, which helps people buy and sell clothes directly from users, companies like Uber and Lyft, which use mobile to aggregate demand and efficiently yet indirectly route that demand to providers who can fulfill the requests. Here, we begin to see a pattern and delineation. One, very few companies are both purely mobile and a marketplace where buyers and sellers are directly interacting with each other prior to a transaction. Two, as a result, newer mobile marketplaces have followed the path carved out by Uber, which collects demand via mobile and then routes those requests to a fleet of willing drivers who are free to take or reject rides. Here, Uber gets around the market liquidity issue presented by mobile by doing the hard work of organizing assets and labor offline and then connecting them to a central hub of demand.
This is the new type of marketplace-driven network effect specific to mobile, where demand is generated online (through mobile) and fulfilled offline (driven by services).
Therefore, there's good reason why we all hear so many "Uber for X" analogies. Startups like GAIN Fitness, HotelTonight, and many others generally take this approach, putting mobile apps in consumers' hands and offering a promise - tap this button, and with some magic, on the other end someone will present an offer to satisfy your demand. For startups, today's reality raises specific tactical concerns. Assuming the startup will land on iOS first, the company either needs enough capital or revenue to be able to get to some equilibrium in the marketplace's first incarnation so that the product can be improved to a point where an Android team can build for that platform. Second, direct marketplaces present sellers with friction points around packaging and shipping or service delivery, while indirect marketplaces, which usually offer some form of an offline service, require liquidity within a location-specific density to work. It only makes sense to make Lyft available to me as a consumer if I live in an area where Lyft operates.
Moving forward, we are already seeing whole new categories of businesses on the "Uber for X" path, and I don't see that trend stopping any time soon. But, what about pure mobile marketplaces directly connecting buyers and sellers, on a more peer-to-peer level? Sure, offerings like Airbnb and others which began on the web have built a large enough brand to play on mobile, but what about companies like Yardseller, which tried to get into the local listings game through apps, or newer apps like Bondsy, and many others I'm sure are out there - and I'd love to hear about them, so please get in touch.
In economies which are all undergoing big structural changes and facing many uncertainties, the elegance, efficiency, and dispassion of a marketplaces presents systems which can be incredibly resistant to external stresses. Mobile fragmentation presents a thorny challenge to startups, and some have responded by overcoming the liquidity hurdle or by creating a new business model to subvert the problem. All of this matters as mobile phones continue to proliferate, as economics remain under duress, as many people look for new sources of income, and as phones present a new way to segment consumers by willingness to pay and location. It's unclear if a startup can create a mobile application that puts buyers directly in contact with sellers at true scale, and while some do exist, my belief is for the next few years most of them in the marketplace category will indirectly match consumers with providers, and that's just fine. It's more efficient this way, for now. And, hey, I could be wrong. Maybe there's a new startup launching today with a direct marketplace vision…and I can't wait to see it in the wild.
Sunday, November 10, 2013
The LA Times Trolls Innocent Teachers
The once respectable Los Angeles Times is leveraging its dwindling platform to attack individual teachers under the guise of data transparency. The editorial board won a court case allowing them to use a highly contentious, self-designed algorithm to rank the best and worst teachers in the Los Angeles Unified School District. Neither the suicide of one of the shamed teachers, nor the wide-spread criticism of the statistical methods have aroused the editorial board's better judgement.
Many school districts, such as the LAUSD, estimate teacher performance based off of their students's standardized test results. So-called “value-added modeling” attempt to estimate a teacher's relative abilities based on how they expect students to do given their past performance.
The school district will be forced to release the data on teacher evaluations to The Times for publication. While I'm all for transparency of government data, there's a few glaring problems with value-added scores that the public might not be aware of.
1. Value-added measures are as unstable as a chain-smoker on a flight from LA to Japan. Teacher ratings often swing wildly from year to year and are sensitive to tiny changes in the statistical methods. The University of Colorado at Boulder's National Education Policy Center found that only about half (46.4%) of LAUSD teachers retained their same effectiveness rating under slight tweaks to the model [PDF].
Specifically, the NEPC added measures of school ranking and early elementary grades into their own value-added model to see how it might disrupt the rankings (and it did). There's many reasons why such variables might not have been originally included: adding in past performance and school transfers makes it difficult to know what in the history of student ultimately led to their current abilities.
Statistical geeks can debate the best models, but if a series of very reasonable decisions leads to radically different rankings, it's way too unstable to shame a teacher in a national newspaper.
2. Standardize tests suck at measuring the value of a teacher. “Test scores largely reflect whom a teacher teaches, not how well they teach,” notes Stanford Professor Education, Linda Darling-Hammond. “In particular, teachers show lower gains when they have large numbers of new English-learners and students with disabilities than when they teach other students.”
The LA Times appears oblivious to this well know fact. In an email, a representative tells me, “Research has repeatedly found that teachers are the single most important school-related factor in a child's education.”
False. Parenting, motivation, and IQ are at least as important, if not vastly more important, to the success of a student than a teacher. Teachers can bring out the best in a student, but a child from a broken home and with an abuse parent just isn't going to do as well.
3. It's not okay to shame everyday citizens. Assume for a moment that the LA Times pulled off a statistical miracle and overcame all of the criticisms of value-added methodology, it's still awful to shame people.
Here was the Times explanation to me
“The Times is committed to reporting on the issues and events that are important to Southern Californians and education is of primary concern to our community. We published the “Grading the Teachers” series and value-added data analysis because parents and the public have a right to some form of objective evaluation of LAUSD teacher effectiveness. The Times value-added rating, which was based entirely on public-record information, should be considered as only one component in overall teacher assessment.”
That's a beautiful theory, but in practice the list paints targets on teachers' backs for tiger-moms and paparazzi press. When the New York Post publicized the name of the “worst teacher”, reporters hounded her and family.
If we lived in a perfect marketplace ideas where nuance was currency and readers spent more than 30 seconds on a post, The Time's might have a better case. But, we don't, and their sloppy editorial decisions are going to hurt innocent teachers.
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