How does education affect economic and social outcomes, and how can it inform public policy? Volume 3 of the Handbooks in the Economics of Education uses newly available high quality data from around the world to address these and other core questions.  With the help of new methodological approaches, contributors cover econometric methods and international test score data.  They examine the determinants of educational outcomes and issues surrounding teacher salaries and licensure.  And reflecting government demands for more evidence-based policies, they take new looks at institutional feaures of school systems.  Volume editors Eric A. Hanushek (Stanford), Stephen Machin (University College London) and Ludger Woessmann (Ifo Institute for Economic Research, Munich) draw clear lines between newly emerging research on the economics of education and prior work.  In conjunction with Volume 4, they measure our current understanding of educational acquisition and its economic and social effects.