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What’s the stupidest thing the NYC Department of Education and Columbia University Teachers College did in the past decade?

Ummm, how bout this: The principal of a popular elementary school in Harlem acknowledged that she forged answers on students’ state English exams in April because the students had not finished the tests... As a result of the cheating, the city invalidated several dozen English test results for the school’s third grade. Show More Summary

Internal Languages of Higher Categories

A summary of what we know and don't know about intensional type theory (HoTT) as an internal language for higher categories (guest post by Chris Kapulkin).

The 2nd Workshop on Fairness, Accuracy and Transparency in Machine Learning: A review

I was one of the organizers of the 2nd workshop on Fairness, Accuracy and Transparency in Machine Learning (FATML) at ICML 2015, and in my alternate career as moderator of data mining panels, I moderated the closing panel. The panelists...Show More Summary

“We can keep debating this after 11 years, but I’m sure we all have much more pressing things to do (grants? papers? family time? attacking 11-year-old papers by former classmates? guitar practice?)”

Someone pointed me to this discussion by Lior Pachter of a controversial claim in biology. The statistics The statistical content has to do with a biology paper by M. Kellis, B. W. Birren, and E.S. Lander from 2004 that contains theShow More Summary

Next To Last Item In A List

Today’s exercise is a reminder about the importance of writing good test code. We have two tasks. The first is to extract the next-to-last item from a linked list; for instance, given the list (1 2 3 4 5) the next-to-last item is 4. The second task is to extract the nth-from-last item from a […]

Ripped from the pages of a George Pelecanos novel

Did anyone else notice that this DC multiple-murder case seems just like a Pelecanos story? Check out the latest headline, “D.C. Mansion Murder Suspect Is Innocent Because He Hates Pizza, Lawyer Says”: Robin Flicker, a lawyer who has...Show More Summary

On deck this week

Mon: Ripped from the pages of a George Pelecanos novel Tues: “We can keep debating this after 11 years, but I’m sure we all have much more pressing things to do (grants? papers? family time? attacking 11-year-old papers by former classmates?...Show More Summary

The 3 Stages of Busy

Last week I ran into a younger colleague who said he had a conference deadline that week and could we get together next week, maybe? So I contacted him on the weekend and asked if he was free. He responded: This week quickly got booked after last week’s NIPS deadline. Show More Summary

Ira Glass asks. We answer.

The celebrated radio quiz show star says: There’s this study done by the Pew Research Center and Smithsonian Magazine... they called up one thousand and one Americans. I do not understand why it is a thousand and one rather than just a thousand. Show More Summary

Racism/sexism in algorithms

For my sins, or more specifically because of my interest in fairness, I was asked to be on a panel discussing algorithmic racism/bias on The Stream, a web/tv show on Al Jazeera English (as opposed to Al Jazeera America, in case you're not already confused).I've never done live TV before, so it was quite nerve-wracking. Show More Summary

Deducing the inverse theorem for the multidimensional Gowers norms from the one-dimensional version

This week I have been at a Banff workshop “Combinatorics meets Ergodic theory“, focused on the combinatorics surrounding Szemerédi’s theorem and the Gowers uniformity norms on one hand, and the ergodic theory surrounding Furstenberg’s multiple recurrence theorem and the Host-Kra structure theory on the other. This was quite a fruitful workshop, and directly inspired the […]

Behind The Numbers: GDP, the Sequel

When the Commerce Department releases its first reading of second-quarter gross domestic product this coming Thursday, there will also be a spate of annual revisions. This happens every year and serves to give more retroactive perspective on the U.S.'s economic growth trajectory.

45 years ago in the sister blog

The post 45 years ago in the sister blog appeared first on Statistical Modeling, Causal Inference, and Social Science.

One-Swappable Array

Today’s exercise helps somebody with their homework: Given an array of unique integers, determine if it is possible to sort the array by swapping two elements of the array. For instance, the array [1,2,6,4,5,3,7] can be sorted by swapping 3 and 6, but there is no way to sort the array [5,4,3,2,1] by swapping two […]

Deducing a weak ergodic inverse theorem from a combinatorial inverse theorem.

Note: this post is of a particularly technical nature, in particular presuming familiarity with nilsequences, nilsystems, characteristic factors, etc., and is primarily intended for experts. As mentioned in the previous post, Ben Green, Tamar Ziegler, and myself proved the following inverse theorem for the Gowers norms: Theorem 1 (Inverse theorem for Gowers norms) Let and […]

More gremlins: “Instead, he simply pretended the other two estimates did not exist. That is inexcusable.”

Brandon Shollenberger writes: I’ve spent some time examining the work done by Richard Tol which was used in the latest IPCC report.  I was troubled enough by his work I even submitted a formal complaint with the IPCC nearly two months...Show More Summary

Stan 2.7 (CRAN, variational inference, and much much more)

Stan 2.7 is now available for all interfaces. As usual, everything you need can be found starting from the Stan home page: Highlights RStan is on CRAN!(1) Variational Inference in CmdStan!!(2) Two new Stan developers!!! ...Show More Summary

An inverse theorem for the continuous Gowers uniformity norm

A few years ago, Ben Green, Tamar Ziegler, and myself proved the following (rather technical-looking) inverse theorem for the Gowers norms: Theorem 1 (Discrete inverse theorem for Gowers norms) Let and be integers, and let. Suppose that is a function supported on such that Then there exists a filtered nilmanifold of degree and complexity […]

Pi the Numbers: 22/7

In the day/month format that is used in some parts of the world, 22/7 is celebrated in some circles (ahem) as Pi Approximation Day?, where 22 divided by 7 yields a quotient that represents pi.

BREAKING . . . Kit Harrington’s height

Rasmus “ticket to” Bååth writes: I heeded your call to construct a Stan model of the height of Kit “Snow” Harrington. The response on Gawker has been poor, unfortunately, but here it is, anyway. Yeah, I think the people at Gawker have bigger things to worry about this week.... Show More Summary

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