Christopher Albert Sims, a towering figure in modern economics whose groundbreaking work on the empirical analysis of cause and effect in the macroeconomy earned him the Nobel Memorial Prize in Economic Sciences, passed away on March 14, 2026, at the age of 83 in Princeton, New Jersey. His passing marks the end of an era for a scholar who profoundly reshaped how economists and central banks understand complex economic systems.

Born on October 21, 1942, in Washington, D.C., Sims demonstrated an early aptitude for mathematics, which would later form the bedrock of his sophisticated econometric models. He spent parts of his early childhood in Germany, Virginia, and Connecticut, before pursuing higher education at Harvard University.

Sims earned his Bachelor of Arts in mathematics from Harvard in 1963, graduating summa cum laude. He continued his studies at Harvard, receiving his Ph.D. in economics in 1968. His doctoral work laid the foundation for a career dedicated to rigorous empirical research and a critical examination of prevailing economic theories.

After a brief teaching stint at Harvard, Sims joined the economics faculty at the University of Minnesota, where he spent two decades. It was during this period that he developed and championed the use of Vector Autoregression (VAR) models, a methodology that revolutionized empirical macroeconomics. His seminal 1980 paper, “Macroeconomics and Reality,” critiqued the overly rigid theoretical assumptions of conventional econometric practices, advocating for a data-driven approach.

In 1990, Sims was appointed the Henry Ford II Professor of Economics at Yale University, further solidifying his reputation as a leading econometrician. His intellectual journey then led him to Princeton University in 1999, where he became the John J.F. Sherrerd '52 University Professor of Economics, a position he held for the remainder of his illustrious career.

His most significant recognition came in 2011 when he was jointly awarded the Nobel Memorial Prize in Economic Sciences with Thomas J. Sargent. The prize honored their independent but complementary research on the causal relationship between economic policy and various macroeconomic variables, such as GDP, inflation, and unemployment. Sims's work provided crucial tools for assessing the direction of causality in central bank monetary policy.

Beyond his groundbreaking research, Sims was a respected leader in the economic community, serving as president of the Econometric Society in 1995 and as president of the American Economic Association in 2012. He was also a Fellow of the Econometric Society, a member of the American Academy of Arts and Sciences, and a member of the National Academy of Sciences.

Sims was known for his independent thinking, his insistence on letting data guide economic understanding, and his profound humility. He is survived by his wife of nearly six decades, Catherine Sears, whom he married in 1967, their three children, and four grandchildren. His intellectual legacy, etched in the foundations of empirical macroeconomics, will continue to influence generations of economists, policymakers, and central bankers worldwide.