From 2cec23ba3a9a0225f634b0b6e70cb49494ea1139 Mon Sep 17 00:00:00 2001 From: WesIngwersen Date: Sun, 25 Oct 2026 20:34:56 -0400 Subject: [PATCH 1/6] docs(faq): correct USEEIO v1.4 references and time series wording Co-Authored-By: Claude Opus 5.5 --- faq.md | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/faq.md b/faq.md index 0d149697..d157a8f1 100644 --- a/faq.md +++ b/faq.md @@ -9,7 +9,7 @@ Short answers to the questions we hear most about Cornerstone EEIO 2026. Each an ## About Cornerstone EEIO 2026 :::{dropdown} What is the Cornerstone Sustainability Data Initiative, and how does it relate to USEEIO and CEDA? -Cornerstone launched in August 2025 to bring USEEIO and CEDA together into one open, comprehensive dataset of Scope 3 spend-based emission factors. Cornerstone EEIO 2026 is the first release of that combined model. It is the continuation of both USEEIO v1.4 and CEDA 2025. Today Cornerstone is the home of 3 additional datasets: eGRID, the GHG EF Hub and Orbae. Learn more at [cornerstonedata.org](https://cornerstonedata.org/), and see the [release candidate note](releases/rc.md) for what is in this release. +Cornerstone launched in August 2025 to bring USEEIO and CEDA together into one open, comprehensive dataset of Scope 3 spend-based emission factors. Cornerstone EEIO 2026 is the first release of that combined model, which builds on both USEEIO and CEDA. Today Cornerstone is the home of 3 additional datasets: eGRID, the GHG EF Hub and Orbae. Learn more at [cornerstonedata.org](https://cornerstonedata.org/), and see the [release candidate note](releases/rc.md) for what is in this release. ::: :::{dropdown} What is changing compared with USEEIO and CEDA? @@ -27,7 +27,7 @@ Both. Data updates reflect real-world change, such as new economic, trade and em ::: :::{dropdown} Why is it called a "release candidate"? -2026 is the first time CEDA and USEEIO are combined in one model, and the first time a time series is released. The two-phase release gives companies time to assess the impact on their most recent year of measurements while the time series is under development. The release candidate (2026-rc.1) is published on October 27, 2026. The full release (2026-v1), with the 2017–2026 time series and the model matrices, follows in early December 2026. See [](releases/rc.md). +2026 is the first time CEDA and USEEIO are combined in one model, and the first time a time series of emission factors is released from either model. The two-phase release gives companies time to assess the impact on their most recent year of measurements while the time series is under development. The release candidate (2026-rc.1) is published on October 27, 2026. The full release (2026-v1), with the 2017–2026 time series and the model matrices, follows in early December 2026. See [](releases/rc.md). ::: :::{dropdown} Will the 2024–2026 factors change between the release candidate and the final version? @@ -56,7 +56,7 @@ See the [model reconciliation](releases/change-log.md#change-log-model-reconcili ::: :::{dropdown} Did the file format change? -Yes. The new release is different from open CEDA and from the USEEIO v1.4. See [](factors/whats-in-a-release.md) for more details. +Yes. The new release is different from Open CEDA and from the USEEIO Supply Chain GHG Emission Factors v1.4. See [](factors/whats-in-a-release.md) for more details. ::: ## Moving from USEEIO or CEDA @@ -65,7 +65,7 @@ Yes. The new release is different from open CEDA and from the USEEIO v1.4. See [ It depends on which sectors and countries your spend falls in. - **Coming from CEDA 2025:** global production-weighted factors fall by 23.3%. In a sample of 400 corporate footprints, the median company sees a 14% decrease. -- **Coming from USEEIO v1.4:** US factors change by −0.8% overall. In the same sample, the median company sees a 1.3% decrease. +- **Coming from the USEEIO Supply Chain GHG Emission Factors v1.4:** US factors change by −0.8% overall. In the same sample, the median company sees a 1.3% decrease. A small median can hide large moves in individual sectors, in both directions. See [](releases/rc.md#how-do-the-emission-factors-change), [](releases/summary-ceda.md) and [](releases/summary-useeio.md). ::: From 469347709b699ab740a520c7e9f08fc18d5371ab Mon Sep 17 00:00:00 2001 From: WesIngwersen Date: Sun, 25 Oct 2026 20:37:10 -0400 Subject: [PATCH 2/6] docs(faq): make the summary and About heading version-independent Co-Authored-By: Claude Opus 5.5 --- faq.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/faq.md b/faq.md index d157a8f1..6a472613 100644 --- a/faq.md +++ b/faq.md @@ -3,10 +3,10 @@ title: Frequently asked questions --- :::{tip} Summary -Short answers to the questions we hear most about Cornerstone EEIO 2026. Each answer links to the page with the full explanation. Cornerstone EEIO is the successor of USEEIO and CEDA, so many answers compare it with those models. +Short answers to the questions we hear most about Cornerstone EEIO and spend-based emission factors. Each answer links to the page with the full explanation. Cornerstone EEIO is the successor of USEEIO and CEDA, so many answers compare it with those models. ::: -## About Cornerstone EEIO 2026 +## About Cornerstone EEIO :::{dropdown} What is the Cornerstone Sustainability Data Initiative, and how does it relate to USEEIO and CEDA? Cornerstone launched in August 2025 to bring USEEIO and CEDA together into one open, comprehensive dataset of Scope 3 spend-based emission factors. Cornerstone EEIO 2026 is the first release of that combined model, which builds on both USEEIO and CEDA. Today Cornerstone is the home of 3 additional datasets: eGRID, the GHG EF Hub and Orbae. Learn more at [cornerstonedata.org](https://cornerstonedata.org/), and see the [release candidate note](releases/rc.md) for what is in this release. From 2d5e30ed45ecac41fef84357d166a117155261ac Mon Sep 17 00:00:00 2001 From: WesIngwersen Date: Sun, 25 Oct 2026 20:37:51 -0400 Subject: [PATCH 3/6] docs(faq): drop the methodological stability sentence Co-Authored-By: Claude Opus 5.5 --- faq.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/faq.md b/faq.md index 6a472613..5041f865 100644 --- a/faq.md +++ b/faq.md @@ -35,7 +35,7 @@ We don't foresee significant changes, but some sector–country combinations cou ::: :::{dropdown} When is the next update? -Releases are published every October so companies can plan for them. The next, Cornerstone EEIO 2027, will be released in October 2027. Cornerstone EEIO 2026 will stay methodologically stable for at least five years, so you have a consistent basis to rebaseline and set targets. See [](releases/index.md) and [](factors/whats-in-a-release.md#update-cadence). +Releases are published every October so companies can plan for them. The next, Cornerstone EEIO 2027, will be released in October 2027. ::: :::{dropdown} Did the sectors change? From 8bf5b2c6858398a1f8c27c004fc5589e341b7ae4 Mon Sep 17 00:00:00 2001 From: WesIngwersen Date: Sun, 25 Oct 2026 20:41:54 -0400 Subject: [PATCH 4/6] docs: drop the five-year methodological stability remark Co-Authored-By: Claude Opus 5.5 --- factors/whats-in-a-release.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/factors/whats-in-a-release.md b/factors/whats-in-a-release.md index cf4910a1..4988ecf1 100644 --- a/factors/whats-in-a-release.md +++ b/factors/whats-in-a-release.md @@ -59,7 +59,7 @@ The data dictionary and five other tabs support the data tabs. The data dictiona ## Update cadence -The Cornerstone EEIO follows an annual update cycle. Every year we release a version named after the release year, so Cornerstone 2027 will be released in 2027. Releases are publicly available every October so companies can plan accordingly. Cornerstone EEIO 2026 will stay methodologically stable for at least the next five years, giving companies a consistent basis to rebaseline and set new targets. +The Cornerstone EEIO follows an annual update cycle. Every year we release a version named after the release year, so Cornerstone 2027 will be released in 2027. Releases are publicly available every October so companies can plan accordingly. +++ From e629664dab011ddde487bcb7b872b9a11cf1140b Mon Sep 17 00:00:00 2001 From: WesIngwersen Date: Mon, 26 Oct 2026 16:27:32 -0400 Subject: [PATCH 5/6] Revert "docs: drop the five-year methodological stability remark" This reverts commit 8bf5b2c6858398a1f8c27c004fc5589e341b7ae4. --- factors/whats-in-a-release.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/factors/whats-in-a-release.md b/factors/whats-in-a-release.md index 4988ecf1..cf4910a1 100644 --- a/factors/whats-in-a-release.md +++ b/factors/whats-in-a-release.md @@ -59,7 +59,7 @@ The data dictionary and five other tabs support the data tabs. The data dictiona ## Update cadence -The Cornerstone EEIO follows an annual update cycle. Every year we release a version named after the release year, so Cornerstone 2027 will be released in 2027. Releases are publicly available every October so companies can plan accordingly. +The Cornerstone EEIO follows an annual update cycle. Every year we release a version named after the release year, so Cornerstone 2027 will be released in 2027. Releases are publicly available every October so companies can plan accordingly. Cornerstone EEIO 2026 will stay methodologically stable for at least the next five years, giving companies a consistent basis to rebaseline and set new targets. +++ From ca8c4c854f627a0d52218146523d3f5713696e00 Mon Sep 17 00:00:00 2001 From: WesIngwersen Date: Mon, 26 Oct 2026 16:27:32 -0400 Subject: [PATCH 6/6] Revert "docs(faq): drop the methodological stability sentence" This reverts commit 2d5e30ed45ecac41fef84357d166a117155261ac. --- faq.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/faq.md b/faq.md index 5041f865..6a472613 100644 --- a/faq.md +++ b/faq.md @@ -35,7 +35,7 @@ We don't foresee significant changes, but some sector–country combinations cou ::: :::{dropdown} When is the next update? -Releases are published every October so companies can plan for them. The next, Cornerstone EEIO 2027, will be released in October 2027. +Releases are published every October so companies can plan for them. The next, Cornerstone EEIO 2027, will be released in October 2027. Cornerstone EEIO 2026 will stay methodologically stable for at least five years, so you have a consistent basis to rebaseline and set targets. See [](releases/index.md) and [](factors/whats-in-a-release.md#update-cadence). ::: :::{dropdown} Did the sectors change?