He has published more than 220 peer-reviewed scientific papers, with many appearing in leading international journals, and he maintains numerous international research collaborations. Perhaps his most prominent work has been as a director of The Dunedin Study for more than 20 years. Known in full as the ‘Dunedin Multidisciplinary Health and Development Study’, the project began in 1975, originally designed as a short-term project to explore how birth events affect later health. A growing interest in the results, however, enabled continuation of the Study and 45 years on it has become renowned across the world as one of the most significant projects of its kind.