A Risk Sciences International news item posted on April 22, 2022 and last updated on September 2, 2025

Risk Sciences International (RSI) investigators Greg Paoli, Shintaro Hagiwara and Daniel Krewski collaborated with investigators from the US Center for Computational Toxicology and Exposure (CCTE) on the development of an analytical framework to evaluate alternative chemical toxicity testing strategies, meeting a need identified by the US National Research Council in its 2009 report on Science and Decision: Advancing Risk Assessment.

This work is presented in two research papers published in Risk Analysis, led by Paul Price at CCTE and Shintaro Hagiwara at RSI. Greg Paoli, a member of the Science and Decisions Committee, was pleased to see this methodological advance come to fruition.

These contributions suggest that while rapid alternative test methods may be subject to greater uncertainty than traditional more expensive animal tests of longer duration, having sufficient information to support risk decision making in a timely manner can result in a lower total social cost by avoiding pubic health impacts that can accrue when decisions are delayed pending the results of toxicity tests of longer duration. 

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Greg Paoli

CEO, Principal Risk Scientist

Greg Paoli is the CEO and Principal Risk Scientist at Risk Sciences International (RSI), a firm he co-founded in 2006 following the integration of his earlier consultancy, Decisionalysis Risk Consultants, with the consulting activities of the McLaughlin Centre for Population...
Read More about Greg Paoli

Daniel Krewski

Chief Risk Scientist

Dr. Daniel Krewski is Chief Risk Scientist and co-founder of Risk Sciences International (RSI), a firm established in 2006 to bring evidence-based, multidisciplinary expertise to the challenge of understanding, managing, and communicating risk. As RSI’s inaugural CEO and long-time scientific...
Read More about Daniel Krewski

Shintaro Hagiwara

Risk Analyst, Statistician

Dr. Shintaro Hagiwara is a Risk Analyst and Statistician at Risk Sciences International (RSI), where he contributes cutting-edge statistical insight to risk assessments, particularly in chemical safety and public health. Since joining RSI’s technical team in 2018 and transitioning to...
Read More about Shintaro Hagiwara

Paul Price

Senior Analyst

Dr. Paul Price is a Senior Analyst at Risk Sciences International (RSI), bringing over four decades of experience as a pioneer in exposure science and chemical risk assessment. Since joining RSI in 2019, Dr. Price has focused on advancing mixture...
Read More about Paul Price

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