Emily Oster
Economist at Brown; writes ParentData and the books Expecting Better and Cribsheet, reading the evidence behind pregnancy and parenting advice.
Emily Oster did not write this page. ppll compiled it from their own words, each linked to the source. Is this you? · Report a mistake
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What they believe
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Consumer safety reports on food contaminants often use reference benchmarks so conservative that the resulting warnings don't hold up.
The core problem is that they choose bizarrely conservative benchmarks that make no sense.
parentdata.orgSaid 7 Sept 2026This on korrents
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The science behind testosterone's importance does not mean most people need to supplement it.
This is all to say: there is real science behind the importance of testosterone, but that's not the same as saying everyone needs to supplement.
parentdata.orgSaid 26 Jul 2026This on korrents
The bold line is korrents’ wording; the quote is theirs. These 2: what they wrote before what they said aloud, one per source, newest first.
Feed
As its own page →Hiding
4 November
1 November
21 October
7 September
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Their words
The core problem is that they choose bizarrely conservative benchmarks that make no sense.
10 August
28 July
26 July
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korrents.com
The science behind testosterone's importance does not mean most people need to supplement it.Their words
This is all to say: there is real science behind the importance of testosterone, but that's not the same as saying everyone needs to supplement.
19 July
From one piece Are Peanut Allergies Going Away? 2 beliefs · parentdata.org
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korrents.com
Introducing peanuts early in infancy substantially reduces a child's risk of developing a peanut allergy.Their words
Then, in 2015, a randomized controlled trial definitively demonstrated that introducing peanuts early dramatically lowered the risk of peanut allergies.
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Their words
In fact, the guidance to avoid allergens for one to three years was probably directly responsible for the increase in allergies.
12 July
From one piece What “Trimester Zero” Should Teach Us Instead 3 beliefs · parentdata.org
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Their words
Unless your doctor tells you otherwise, you do not need to do anything else to reduce toxins; that is a meaningless idea.
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Their words
But too many people arrive at the point of trying to conceive without a complete understanding of what it takes to actually get pregnant - how their cycle works, things that can impact fertility, when to seek help - and this is a problem.
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Their words
Going on the perfect diet, starting a meditation practice, taking a bunch of expensive supplements - there isn't any data to suggest that these will help you get pregnant.
9 July
From one piece What the Data Says About Preschool and Pre-K 3 beliefs · parentdata.org
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Their words
focus on lower-income children, which can make some of the effects look larger.
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korrents.com
The most consistent finding on preschool and pre-K is that it raises kindergarten readiness.Their words
The most consistent finding is that pre-K raises kindergarten readiness
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korrents.com
The research literature robustly supports the value of Head Start and similar early childhood education programs.Their words
the literature robustly supports the value of Head Start programs in particular, as well as other early childhood education programs modeled on that approach.
28 June
Nothing matches.
Beliefs
Korrents What they believe 10 beliefs — each backed by an exact quote.
Each is a — compiled by korrents.com, not by them: the one-line wordings are korrents', the quotes are theirs.
Recent
Consumer safety reports on food contaminants often use reference benchmarks so conservative that the resulting warnings don't hold up.
The core problem is that they choose bizarrely conservative benchmarks that make no sense.
The Latest: Are your kids’ snacks full of chemicals? Said 7 Sept 2026
The science behind testosterone's importance does not mean most people need to supplement it.
This is all to say: there is real science behind the importance of testosterone, but that's not the same as saying everyone needs to supplement.
Everyone Is Talking About Male Testosterone Said 26 Jul 2026
Delaying introduction of peanuts and other allergens in infancy increases a child's risk of developing food allergies.
In fact, the guidance to avoid allergens for one to three years was probably directly responsible for the increase in allergies.
Are Peanut Allergies Going Away? Said 19 Jul 2026
Show 7 more
Introducing peanuts early in infancy substantially reduces a child's risk of developing a peanut allergy.
Then, in 2015, a randomized controlled trial definitively demonstrated that introducing peanuts early dramatically lowered the risk of peanut allergies.
Are Peanut Allergies Going Away? Said 19 Jul 2026
There is no data showing that following a strict diet, meditation practice, or taking expensive supplements helps someone get pregnant.
Going on the perfect diet, starting a meditation practice, taking a bunch of expensive supplements - there isn't any data to suggest that these will help you get pregnant.
What “Trimester Zero” Should Teach Us Instead Said 12 Jul 2026
Too many people begin trying to conceive without understanding how their cycle works, what can affect fertility, or when to seek help.
But too many people arrive at the point of trying to conceive without a complete understanding of what it takes to actually get pregnant - how their cycle works, things that can impact fertility, when to seek help - and this is a problem.
What “Trimester Zero” Should Teach Us Instead Said 12 Jul 2026
Taking extra steps to 'reduce toxins' beyond what the body naturally does is unnecessary, and the idea itself is meaningless.
Unless your doctor tells you otherwise, you do not need to do anything else to reduce toxins; that is a meaningless idea.
What “Trimester Zero” Should Teach Us Instead Said 12 Jul 2026
The research literature robustly supports the value of Head Start and similar early childhood education programs.
the literature robustly supports the value of Head Start programs in particular, as well as other early childhood education programs modeled on that approach.
What the Data Says About Preschool and Pre-K Said 9 Jul 2026
The most consistent finding on preschool and pre-K is that it raises kindergarten readiness.
The most consistent finding is that pre-K raises kindergarten readiness
What the Data Says About Preschool and Pre-K Said 9 Jul 2026
Studies showing large benefits from early childhood programs mostly focus on lower-income children, which can make the effects look larger than they would for a broader population.
focus on lower-income children, which can make some of the effects look larger.
What the Data Says About Preschool and Pre-K Said 9 Jul 2026
What is a korrent?
A korrent is a belief a person has stated in their own words: one sentence stating the claim, backed by a quote and a source, kept at korrents.com.
Under a name here, the quoted block is what they actually said. The korrent beneath it is the claim those words support, in korrents' wording — tap it to see the record, its source, and who else holds it.
Nobody here wrote their own korrents. They are compiled from public statements, and a person can change their mind, which is recorded too.
Recommends rcmnd
rcmnd What they recommend 3 things — each backed by an exact quote.
Compiled by rcmnd.app, not by them: the quotes are theirs, and each links to the post it was copied from.
Recent
Recommends Parenting in a Pandemic: How to help your family through COVID-19
She wrote a book (seriously, DURING THE PANDEMIC SHE WROTE A WHOLE BOOK) for parents which I highly recommend, and not only because it references my newsletter.
parentdata.org 20 Aug 2020
What others say about Parenting in a Pandemic: How to help your family through COVID-19 →
Recommends TED-Ed Riddles
Recommendations Carrot Soup & Peanut Butter Cookies Coding with your kids in Scratch (also see Scratch Jr for the iPad) TedEd Riddles
parentdata.org 30 Apr 2020
Recommends Scratch
As we all continue our quarantine journey, I thought I'd start here with a few recommendations which have been working for our family. And then, back to COVID. Today, I wanted to dive into the question of immunity. Recommendations Carrot Soup & Peanut Butter Cookies Coding with your kids in Scratch (also see Scratch Jr for the iPad) TedEd Riddles
parentdata.org 30 Apr 2020
Where they publish
Newsletter ParentData Her newsletter reading the data behind pregnancy and parenting questions. Has a feed; the card shows only her own posts.
The feed bylines her posts two ways — “Emily Oster” and “Emily Oster, PhD” — and both are matched since the byline rule learned to drop a trailing credential. Other contributors write there too, and their items are dropped by the per-item byline filter.
Recent
- Is It Better to Stay at Home or Work? 4 Nov 2026 The data behind the mommy wars and how to decide what’s right for you
- New Research: Does Choline Raise IQ? 4 Nov 2026 Subscribe to ParentData You’ve used all of your free article views. Subscribe today to get: Unlimited access to articles on ParentData Personalized newsletters delivered to your inbox Invitations to virtual events with…
- The Latest: What’s going on with measles now? 1 Nov 2026 Plus the latest on IVF risks
Show 11 more
- Headline of the Week: Beware Annie’s Cheddar Bunnies! (Or not) 21 Oct 2026 Subscribe to ParentData You’ve used all of your free article views. Subscribe today to get: Unlimited access to articles on ParentData Personalized newsletters delivered to your inbox Invitations to virtual events with…
- New Research: Is Pink Noise Dangerous? 21 Oct 2026 Subscribe to ParentData You’ve used all of your free article views. Subscribe today to get: Unlimited access to articles on ParentData Personalized newsletters delivered to your inbox Invitations to virtual events with…
- The Latest: Are your kids’ snacks full of chemicals? 7 Sept 2026 Plus the latest on fall vaccines and antidepressants in pregnancy
- How to Improve Your Immunity With Young Kids 10 Aug 2026 The data on sleep, vitamin C, zinc, and more
- Dinner, Planned: 5 Minutes to Less Mental Load 28 Jul 2026 Subscribe to ParentData You’ve used all of your free article views. Subscribe today to get: Unlimited access to articles on ParentData Personalized newsletters delivered to your inbox Invitations to virtual events with…
- Everyone Is Talking About Male Testosterone 26 Jul 2026 What the data says about testosterone levels and supplementation
- Are Peanut Allergies Going Away? 19 Jul 2026 What a major change in guidance for parents looks like today
- What “Trimester Zero” Should Teach Us Instead 12 Jul 2026 We need comprehensive fertility education — not supplements
- What the Data Says About Preschool and Pre-K 9 Jul 2026 Is it worth it?
- How to Choose a School for Your Child 9 Jul 2026 What the data says actually matters
- There Have Been Two Botulism Outbreaks in Infant Formula. Why? 28 Jun 2026 What we know about the ByHeart and Nara Organics recalls — and what we don't
Link verified 20 Sept 2026. Recent items update automatically from the channel.
About the English under a post
Some people here publish in a language other than English. Where they do, this site shows a machine translation beneath the post, in this typeface — the site's own, not theirs.
The post itself is never changed, moved or hidden: what is set in the serif above is exactly what the person published, and it is what to quote them on. A translation can be wrong in ways that matter, especially about tone.
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