His primary interest is in uncovering the connections between our behaviour as consumers and the remote and often unseen consequences of these behaviours. To explore this issue he has used a range of analytical tools, including multi-regional input–output analysis, life-cycle assessment, and general equilibrium models. While his work to date has been largely quantitative, he has a particular interest in the sociological aspects of consumer behaviour, the relationships between economic agents, and the politics of the environment.