How technology affects learning has been at the centre of recent debates over educational inputs. In 1994, the Israeli State Lottery sponsored the installation of computers in many elementary and middle schools. This programme provides an opportunity to estimate the impact of computerisation on...

Reduced labour market flexibility may protect some native workers from immigrant competition but can increase negative effects on equilibrium employment. This motivates an analysis of immigration effects interacted with institutions. OLS estimates for European countries show small, mostly...

Instrumental Variables (IV) methods identify internally valid causal effects for individuals whose treatment status is manipulable by the instrument at hand. Inference for other populations requires homogeneity assumptions. This paper outlines a theoretical framework that nests causal...