Scott Irwin's Blog

August 25, 2025

SREs

Last Friday, the EPA released its decision on 2016-2024 SREs (small refinery exemptions) under the RFS. The EPA awarded 63 full SREs and 77 partial (50%) exemptions. The total for … Read More Test

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Published on August 25, 2025 08:13

August 8, 2025

Friday Fun

If you’ve read my book Back to the Futures, you know that I have had a lifelong passion for things that go fast. I grew up going to dirt … Read More Test

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Published on August 08, 2025 08:23

June 2, 2025

A Day in the Life

Many of you have probably noticed that higher education is having a rough go of it right now. There is a new headline almost every day about the Trump Administration’s … Read More Test

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Published on June 02, 2025 06:46

May 19, 2025

Genetic Improvement in Crop Yields

A fundamental component of agricultural productivity is genetic gain in crop yields. Improving the genetic potential of crop yields has been central to most of the world escaping the recurring … Read More Test

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Published on May 19, 2025 09:49

May 5, 2025

A Ceasefire Proposal for the SRE Wars


There has been a lot of leaking lately in DC about renewable volume obligations (RVOs) for the RFS in 2026 and perhaps 2027. These leaks suggest the Trump EPA will … Read More Test

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Published on May 05, 2025 07:02

March 31, 2025

A Market Genius

A few weeks ago, my publishing imprint, Ceres Books, released It’s All Speculation by Tom Hieronymus. It is a collection of Tom’s writings across his career that stretched from … Read More Test

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Published on March 31, 2025 07:24

March 3, 2025

The Magic of AI

Last week, my little publishing imprint Ceres Books released a new title—It’s All Speculation by Tom Hieronymus. It is a collection of writings by Tom on markets and … Read More Test

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Published on March 03, 2025 05:39

February 25, 2025

It’s All Speculation

I am very pleased to share this guest blog post from Dwight Sanders of Southern Illinois University. He wrote an extended review of the newly released book It’s All Speculation Read More Test

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Published on February 25, 2025 10:24

January 6, 2025

Plain Talk on Inflation

There has been a rousing debate going on in the last couple of years about the source of the recent round of inflation in the U.S. John Cochrane just posted … Read More Test

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Published on January 06, 2025 07:15

December 16, 2024

Basketball Day

In a post last week, I shared one of my favorite in-class exercises on coin-flipping and random walks. A related and equally fun day in my commodity price analysis … Read More Test

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Published on December 16, 2024 04:40