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Welcome to my website. I am a Visiting Professor of Economics at Universitat Jaume I, Spain. Until January 2022 I was a Professor of Economics at the University of Sheffield, UK.

Most of my research is in the area of health econometrics, and I have a particular interest in stated preference methods and the econometric analysis of discrete choice data. I have written several modules for the statistical software package Stata.

I am affiliated with the Health Econometrics and Data Group at the University of York and the International Research Collaborative for Health Economic Experiments.

I am an Associate Editor of the Journal of Choice Modelling, which publishes theoretical and applied papers in the field of choice modelling. I have given short courses and guest lectures on discrete choice methods in a number of countries (the UK, France, Italy, Sweden and Norway), and have acted as a consultant for various organisations.