Data skeptic Cathy O’Neil uncovers the dark secrets of big data, showing how our "objective" algorithms could in fact reinforce human bias.
Why you should listen
In 2008, as a hedge-fund quant, mathematician Cathy O’Neil saw firsthand how really really bad math could lead to financial disaster. Disillusioned, O’Neil became a data scientist and eventually joined Occupy Wall Street’s Alternative Banking Group.
With her popular blog mathbabe.org, O’Neil emerged as an investigative journalist. Her acclaimed book Weapons of Math Destruction details how opaque, black-box algorithms rely on biased historical data to do everything from sentence defendants to hire workers. In 2017, O’Neil founded consulting firm ORCAA to audit algorithms for racial, gender and economic inequality.
What others say
When there is wrongdoing in fields that are both complex and opaque, it often takes a whistle-blower to inform the public. That’s exactly what former quant trader turned social activist Cathy O’Neil has become for the world of Big Data.
Cathy O'Neil’s TED Talk
More news and ideas from Cathy O'Neil
Live from TED2017
Connection and community: The talks of Session 7 of TED2017
April 27, 2017
We’re more connected than ever before but, in some parts of the world, life has never been more difficult. From refugee camps full of people displaced by war to urban blight in the developed world, our problems are growing more complex. But in that strife lies opportunity. In the seventh session of TED2017, hosted by […]
Continue readingTech
Justice in the age of big data
April 6, 2017
Justice should be blind, but the predictive policing software used in much of the US has bias and misunderstanding programmed right into it, says data scientist Cathy O’Neil.
Continue reading

