Contributor(s): Professor Stephen Nickell | This lecture will look at immigration and its economic effects including the contribution to population growth. Why does housing not keep up with population growth? More generally, why do we find it so hard to house our population decently? Stephen Nickell is warden of Nuffield College, Oxford and a member of the Budget Responsibility Committee at the Office for Budget Responsibility. Professor John Van Reenen is Director of the Centre of Economic Performance (CEP) at LSE.