Jan de Leeuw is a retired (but not finished) Distinguished Professor of Statistics, former chairperson of the Department of Data Theory at Leiden University, founding chair and long-time chairperson of the UCLA Department of Statistics, former president of the Psychometric Society, founding editor and long-time editor-in-chief of the Journal of Statistical Software, long-time editor-in-chief of the Journal of Multivariate Analysis, former editor-in-chief of the Journal of Educational and Behavioral Statistics, fellow of the American Statistical Association, fellow of the Institute of Mathematical Statistics, and corresponding member of the Royal Netherlands Academy of Sciences.

Jan currently produces works from his home in Massachusetts, along with robust animal and plant cohorts, and his partner Nicole Anne Francus de Leeuw, a linguist, semiotician, and educator. Beginning in 1990 and carried through to completion in late 2021-early 2022, Nicole solved Universal Grammar, solved the Universal Model in 4D into Quantum and back again. The Quantum Codex is Complete. It is “The Francus Codex,” which is the semiotic quantum codex behind quantum knowing and communicating.