Frank LadAn advocate of the constructive mathematical viewpoint of Bruno de Finetti, Frank Lad is a research associate at the Department of Mathematics and Statistics, University of Canterbury. He is the author of Operational Subjective Statistical Methods: amathematical, philosophical, and historical introduction, New York: John Wiley, 1996. Many journal publications in mathematical statistics are available on his pages at researchgate.net. These include "Extropy: complementary dual of entropy", Statistical Science, 2015 with Giuseppe Sanfilippo and Gianna Agrò. He has lectured widely throughout the world. Residing in Otautahi/Christchurch, Aotearoa/New Zealand, he currently tends his garden, and tutors neighbourhood children in arithmetic. Read More Read Less