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Jason Grotto

Jason Grotto is a former reporter for ProPublica Illinois, where he covered issues related to municipal finance, including pensions, debt and taxation.

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Born and raised in Chicago, former ProPublica Illinois reporter Jason Grotto specializes in quantitative analysis, using databases, statistics and mapping to ferret out corruption, negligence and bad public policy. Previously, he worked as an investigative reporter for the Chicago Tribune and the Miami Herald. His project exposing widespread inaccuracies and disparities in Cook County’s property tax assessment system was a Pulitzer Prize finalist for local reporting and received the Gerald Loeb Award for local reporting in 2018. He has also reported on the pension crisis in Chicago and Illinois and led another Gerald Loeb Award-winning investigation on Chicago Public Schools’ disastrous use of auction-rate securities. He has uncovered fraud in federal poverty programs, problems in Iraq war contracting and flaws in the Chicago Housing Authority’s Plan for Transformation.

He was a 2015 Nieman Fellow at Harvard University, where he studied municipal finance. Other honors include a Chicago/Midwest Emmy Award, an Investigative Reporters and Editors Award and the Society of Environmental Journalists Award. He earned a master’s degree in journalism from the University of Missouri in 2000 and a bachelor’s in U.S. history from the University of Oregon in 1995.

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The Tax Divide

Cook County Assessor Joe Berrios’ Defeat Opens the Door to Reform

Democratic primary winner Fritz Kaegi pledged change, but delivering it won’t be easy.

The Tax Divide

Flawed Assessments Caused $2 Billion Shift in Property Taxes, Study Finds

Under Cook County Assessor Joseph Berrios, assessment system shaved $1 billion from Chicago’s most expensive homes, while owners of lower-valued homes picked up the tab.

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The Tax Divide

Cook County’s Residential Property Tax Assessments Deeply Unfair, Independent Study Confirms

Findings that assessments were error-ridden and burdened the poor undermine Assessor Joseph Berrios’ claims that he properly valued residential property.

Illinois Newsletter

Sometimes, Impact Isn’t All It’s Cracked Up To Be

Claims from officials that they’re acting in response to a story need to be investigated, too.

The Tax Divide

As March Primary Nears, Study on Cook County Property Tax System Still Under Wraps

Initial mid-December deadline for review gives way to new release date: late February.

The Tax Divide

Rauner Takes Aim at State Lawmakers Who Appeal Property Taxes

But the Illinois governor's effort may have little impact on the system.

The Tax Divide

Ethics Board Fines Cook County Assessor Over Campaign Contributions

Rulings add to controversy surrounding Assessor Joseph Berrios, though Berrios’ lawyers say contribution limits are unconstitutional.

The Tax Divide

Cook County Assessor’s Old-School Politics Come With a Price for Taxpayers

As Berrios’ court fight drags on, critics and others fear patronage hurts the office’s property tax work.