ArchiveJune 2016

NY Times: Majority of our time is spent on data cleaning, not data analysis

Yet far too much handcrafted work — what data scientists call “data wrangling,” “data munging” and “data janitor work” — is still required. Data scientists, according to interviews and expert estimates, spend from 50 percent to 80 percent of their time mired in this more mundane labor of collecting and preparing unruly digital data, before it can be explored for useful nuggets. “Data wrangling is...

If you care about helping the uneducated, you should love Uber

Beyond higher pay and flexibility, Uber and Lyft created opportunities for underrepresented communities. I’ve seen Austinites who are deaf, or for whom English is not their first language, drive for Uber and Lyft successfully. Imagine an entire underrepresented community offered a new opportunity to earn a living, now part of the more than 10,000 people that have lost income. In the startup...

Data on what Uber drivers make

How are Uber fares calculated? When someone takes a ride with you, they are charged a fare plus a “Rider Fee”. The fare for UberX in Los Angeles is currently $0.18 a minute + $1 a mile. If there is “Surge Pricing” then the entire fare is multiplied by that number. Surge Pricing means Uber increases the fare prices during certain times of higher demand, making these hours more attractive for...

It’s a quant world now: analysis of texts for causal language

Via Tyler Cowen: We hypothesized that the increased role of science, education, and technology in Western society in the relatively recent past should have been accompanied by detectable cognitive changes and, more specifically, by an increased focus on causality. To test this hypothesis, we measured the amount of causal language in historical texts in five corpora. In four of the five corpora...

Faculty may review consultant’s report only in presence of Dean’s assistant after signing NDA!

In an effort to chart the future of the law school, SLU recently hired the consulting firm Alix Partners to compile potential changes to the law school’s operations. At least some of the recent staffing moves followed. Both the law school and Alix partners agreed to keep the report confidential. In an email obtained by the Post-Dispatch, Wolff told faculty and staff the report would be made...

UNC System reduces college costs by hiring some joker for $250K per year

UNC President Margaret Spellings announced the hire of her top strategist Thursday as the UNC system’s governing board sorted through issues such as student debt, college completion and a huge demographic shift under way in North Carolina. Andrew P. Kelly, now director of the Center on Higher Education Reform at the American Enterprise Institute, will be UNC’s senior vice president for strategy...

Student evaluations of teaching are not only unreliable, they are significantly biased against female instructors

To answer this question, we apply nonparametric permutation tests to data from a natural experiment at a French university (the original study by Anne Boring is here), and a randomized, controlled, blind experiment in the US (the original study by Lillian MacNell, Adam Driscoll and Andrea N. Hunt is here). We confirm and extend the studies’ main conclusion: Student evaluations of teaching (SET)...

About me

Stephen

Professor and quant guy. Libertarian turned populist Republican. Trying to learn Japanese and play Spanish Baroque music on the ukulele.

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