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Katie M Bollman

@kathrynbollman

Econ AP at Oregon State | Spartans Will, 🦫 Build

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03.08.2023
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Latest posts by Katie M Bollman @kathrynbollman

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The Criminal Justice team at Arnold Ventures is looking for a pending/recent PhD with strong causal inference skills, for a remote, part-time consulting position.

This is a great opportunity for someone considering a transition from academia to the policy space.

Deadline: March 15

Please share!

03.03.2026 00:17 πŸ‘ 19 πŸ” 20 πŸ’¬ 0 πŸ“Œ 0
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It’s Pub Day!

My first book, The Science of Second Chances, hits shelves today. I can’t wait to hear what y’all think.

I hope it fills you with hope and optimism about what is possible in the public safety space. ✨

24.02.2026 13:45 πŸ‘ 75 πŸ” 15 πŸ’¬ 3 πŸ“Œ 0
18.02.2026 03:16 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Peer effects through meme-ing, lock it in πŸ˜‚

18.02.2026 03:15 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

@imbernomics.bsky.social
Lighting the Imberman Signal

17.02.2026 23:53 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Question for my Ed colleagues… what do we know about the mechanisms by which teacher peer effects show up?

I.e. if I have a highly effective colleague, *how* do they make me better?

17.02.2026 23:51 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
More Hours, More Work: Head Start Expansions Boost Maternal Employment

by Chloe Gibbs, Esra Kose, and Maria Rosales-Rueda

Abstract: Women’s employment remains highly sensitive to childcare constraints, making childcare availability a critical lever for supporting mothers’ labor force attachment. We study the effects of expanded full-day programming in Head Start, using the 2016 federal funding initiative that targeted grantees with low full-day enrollment. Linking administrative program data, geo-coded center locations, and household data on employment, we estimate a difference-in-differences design by comparing mothers of young children in treated and untreated areas. The policy increased full-day enrollment by 19 percent and raised single mothers’ employment (1.9%), hours (2.5%), and earnings (6.5%). Results show that extending program duration meaningfully improves maternal labor market outcomes.

More Hours, More Work: Head Start Expansions Boost Maternal Employment by Chloe Gibbs, Esra Kose, and Maria Rosales-Rueda Abstract: Women’s employment remains highly sensitive to childcare constraints, making childcare availability a critical lever for supporting mothers’ labor force attachment. We study the effects of expanded full-day programming in Head Start, using the 2016 federal funding initiative that targeted grantees with low full-day enrollment. Linking administrative program data, geo-coded center locations, and household data on employment, we estimate a difference-in-differences design by comparing mothers of young children in treated and untreated areas. The policy increased full-day enrollment by 19 percent and raised single mothers’ employment (1.9%), hours (2.5%), and earnings (6.5%). Results show that extending program duration meaningfully improves maternal labor market outcomes.

🚨🚨 It's new research week for me on the socials! 🚨🚨

First up, just released today as an NBER working paper:

"More Hours, More Work: Head Start Expansions Boost Maternal Employment" with fantastic coauthors Esra Kose and Maria Rosales-Rueda

www.nber.org/papers/w34831

17.02.2026 01:48 πŸ‘ 75 πŸ” 32 πŸ’¬ 1 πŸ“Œ 0
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On Fridays we wear gameday green!

14.02.2026 00:36 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Robynn Cox and I have a new paper! It's about the history of predictive algorithms in criminal justice, back in the 1920s-1950s. This paper is the result of five years of research and we're so happy to see it out. 🧡 1/

13.02.2026 14:39 πŸ‘ 59 πŸ” 26 πŸ’¬ 2 πŸ“Œ 1
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New @nber.org paper with @caitlinpatler.bsky.social &
@elizabethacox.bsky.social out!

We examine how ICE arrests differ in Trump 2.0 vs. 1.0

Key Findings 🧡

1) MANY more arrests in Trump 2.0 than 1.0

2) When arrests spike, % arrested w criminal conviction falls

www.nber.org/papers/w3479...

09.02.2026 15:48 πŸ‘ 95 πŸ” 55 πŸ’¬ 5 πŸ“Œ 3
American Economic Association: JOE Listings - February 1, 2026 - July 31, 2026

I am excited to be hiring two post-doctoral positions at UCLA--please share with your networks. www.aeaweb.org/joe/listing.....

03.02.2026 00:48 πŸ‘ 25 πŸ” 24 πŸ’¬ 0 πŸ“Œ 1
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Thrilled to be presenting at UConnβ€” an institution that excels at two of my favorite things: economics and basketball!

02.02.2026 19:06 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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πŸ†• Free online course on private enterprise, productivity & economic growth by STEG & PEDL (@cepr.org)

Through 14 lectures, you can learn from leading researchers on one of the central questions of economic development, how to increase productivity.

Register here: cepr-org.zoom.us/meeting/regi...

21.01.2026 16:27 πŸ‘ 12 πŸ” 11 πŸ’¬ 1 πŸ“Œ 2
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Farewell to Michigan
On (to) Wisconsin!

Would love to grab coffee with other poverty, crime, policing, or policy/econ folks while here in the coming months!

20.01.2026 17:58 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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I just posted the ViCE seminar schedule for early spring 2026:

14.01.2026 17:27 πŸ‘ 9 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0
Statement by Federal Reserve Chair Jerome H. Powell
Statement by Federal Reserve Chair Jerome H. Powell YouTube video by Federal Reserve

Video message from Federal Reserve Chair Jerome H. Powell:
www.youtube.com/watch?v=KckG...
www.federalreserve.gov/newsevents/s...

12.01.2026 00:35 πŸ‘ 24034 πŸ” 9202 πŸ’¬ 1150 πŸ“Œ 2892
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Trump Says β€˜Housing First’ Failed the Homeless. Here’s What the Evidence Says.

Our colleague Bill Evans was quoted in this recent New York Times @nytimes.com article on housing and homelessness: www.nytimes.com/2025/12/25/u...

08.01.2026 13:29 πŸ‘ 2 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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Using RCTs in economic education research Randomized controlled trials (RCTs) have become an essential tool for economists. The credibility revolution in empirical economics emphasizes research designs that identify causal effects, and ran...

New paper alert! (Is that still a thing?)

"Using RCTs in Economic Education Research" (w/ @lizschroeder.bsky.social)

It's your ultimate how-to guide for running an RCT in economic education. We cover RCT design, power, IRB, implementation, & more. 1/3 www.tandfonline.com/doi/full/10....

07.01.2026 14:36 πŸ‘ 5 πŸ” 2 πŸ’¬ 2 πŸ“Œ 0

Already pre-ordered but looking forward to teaching with it!

06.01.2026 22:45 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

While this is not intended as an β€œacademic” book, I think it would be a great addition to courses on research methods, crime, public policy, and applied micro β€” at both undergrad & grad levels. If you’re interested in using the book in your course, I’d be happy to send you a review copy! Email me.

06.01.2026 13:09 πŸ‘ 8 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0

I just updated my spreadsheet of crime-related papers published in top economics journals:

docs.google.com/spreadsheets...

02.01.2026 20:12 πŸ‘ 16 πŸ” 8 πŸ’¬ 0 πŸ“Œ 0

A new years wish:

May 2026 bring you as much joy as Indiana’s win and the chaos of the Sugar Bowl brought me

02.01.2026 05:00 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Looking forward to reading this when Molly finishes itβ€” but for now, she wants everyone to know she gives it two paws up!
@itsafronomics.bsky.social

01.01.2026 20:09 πŸ‘ 16 πŸ” 0 πŸ’¬ 0 πŸ“Œ 1
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Great pre-doc opportunities at @econ.uzh.ch in Zurich for aspiring PhD candidates from low- & middle income countries or with a refugee/asylum seeker background.

Predoctoral Program Global Talent Common Application: www.facultyhiring.oec.uzh.ch/auth/Apply/0... Please share widely in your networks!

29.12.2025 13:09 πŸ‘ 20 πŸ” 21 πŸ’¬ 0 πŸ“Œ 0
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Gift wrapping is my passion…

Happy Christmas to all!

24.12.2025 16:17 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Katie Bollman Welcome! I am an Assistant Professor of Economics in the School of Public Policy at Oregon State University and an affiliate of the Wilson Sheehan Lab for Economic Opportunities (LEO) and the Collabor...

Updates on my website today!

-Frosty Climate, Icy Relationships: Cold and Intimate Partner Violence in Peru moves up to the β€œAccepted Papers” section (JDE!)

-New Counterfactual simulator app for Gun Policy and the Steel Paradox

Check them out at katiebollman.com

πŸŽ‰πŸŽ‰πŸŽ‰

16.12.2025 20:50 πŸ‘ 19 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
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13.12.2025 22:24 πŸ‘ 33 πŸ” 14 πŸ’¬ 2 πŸ“Œ 0
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Cool job alert:

"Postdoctoral Scholar: Criminal Justice Research Center & PA Department of Corrections"

This is an opportunity to contribute to the fantastic research program at the PA DOC under Bret Bucklen.

12.12.2025 17:17 πŸ‘ 10 πŸ” 5 πŸ’¬ 1 πŸ“Œ 0
Summer Economics Fellows Program

The AEA Summer Economics Fellows Program application portal is now open at aeaweb.org/about-aea/co.... #econsky

11.12.2025 14:01 πŸ‘ 7 πŸ” 5 πŸ’¬ 0 πŸ“Œ 1
Who Teaches Matters: The Impact of Instructor Gender on the Persistence of Women in Economics Using near-random assignment of students to instructors at a broad-access public university, we estimate causal effects of instructor-student gender matching on

New working paper with my coauthors: Who Teaches Matters.
Using near-random assignment at a broad-access public university, we provide causal evidence that female instructors significantly increase women’s persistence in economics.
πŸ”— papers.ssrn.com/sol3/papers....
#Econ #EconResearch

11.12.2025 16:08 πŸ‘ 4 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0