provides additional instruction time to students in low achieving lower secondary schools of Southern Italy. We control for … group across grades and the composition of teachers in the school assigned to each group is substantially stable over time …. We contrast groups with and without additional instruction time in participating schools, to groups in non …

unlikely to be stable. This paper documents the time variation in the responses of yield curves and exchange rates using high …-frequency data from January 2000 through August 2011. Significant time variation in news effects is present for those announcements … that have the largest effects on asset prices. The time variation in effects is explained by economic conditions, including …

unlikely to be stable. This paper documents the time variation in the responses of yield curves and exchange rates using high … frequency data from January 2000 through August 2011. Significant time variation in news effects is present for those … announcements that have the largest effects on asset prices. The time variation in effects is explained by economic conditions …