Jeff Larson
Jeff Larson is a reporter at ProPublica.
Jeff Larson is a reporter at ProPublica. He is a winner of the Livingston Award for the 2011 series Redistricting: How Powerful Interests are Drawing You Out of a Vote. Jeff's public key.
Millions of Americans’ Medical Images and Data Are Available on the Internet. Anyone Can Take a Peek.
Hundreds of computer servers worldwide that store patient X-rays and MRIs are so insecure that anyone with a web browser or a few lines of computer code can view patient records. One expert warned about it for years.
Updated: Facebook Political Ad Collector
See how political advertisers target you. Use this database to search for political ads based on who was meant to see them.
What Does Facebook Consider Hate Speech?
Our analysis shows that Facebook’s content reviewers often make different calls on whether to allow or delete items with similar content. See the inconsistencies.
These Are the Job Ads You Can’t See on Facebook If You’re Older
It is against the law to discriminate against workers older than 40 in hiring and recruitment. We found dozens of companies who bought Facebook ads aimed at recruiting workers within limited age ranges.
How We Are Monitoring Political Ads on Facebook
ProPublica built software and a machine-learning algorithm to allow Facebook users to send us the political ads that appear on their Facebook news feeds.
Political Ads on Facebook
To make American campaigns more transparent, we’ve built a tool to display political ads that are rarely seen outside their selected audience of Facebook users.
Facebook Allowed Political Ads That Were Actually Scams and Malware
These ads raise doubts about Facebook’s ability to monitor paid political messages. In each case, the ads ran afoul of Facebook’s own guidelines to curb misleading and malicious advertising.
Facebook Allowed Questionable Ads in German Election Despite Warnings
CEO Mark Zuckerberg promised to ensure the campaign’s integrity, but the company didn’t take down anti-Green party posts of unknown origin.
German Political Ads Collected From Facebook
During the German parliamentary elections in September, many Germans used ProPublica's Political Ad Collector to identify political advertising in their Facebook news feeds. This database provides a rare window into political ads on Facebook, which are not normally seen by the general public.
California Regulators Require Auto Insurers to Adjust Rates
The state changed its approach in response to ProPublica’s finding that minority neighborhoods were paying higher premiums than white areas with the same risk.