Lena Neij is Professor at the International Institute for Industrial Environmental Economics at Lund University, Sweden. Her research is focused on the dynamics of the energy system and the analysis of governance and policies for a more sustainable development. The core issue has been development and assessment of methods for analysing the dynamics of energy systems in view of technical change, i.e. development, introduction, and diffusion of new technology, and policy measures for effecting and accelerating technical change. The research, which has been system based and interdisciplinary, has covered energy for sustainable development in general, with a focus on renewable energy technologies, energy efficiency and sustainable urban development.