Sjak Smulders Tilburg   ,   J.A.Smulders@uvt.nl     Biographical Sketch: Skills and Expertise Technological Change Economic Growth Environmental Economics Economic History IPR International Trade International Economics Development Economics Energy Economics Trade   Primary Research Focus: Technological Change, Economic Growth, Environmental Economics,International Trade, Development Economics, Energy Economics   JEL Areas: O4 : Economic Growth and Aggregate Productivity: General Q5 : Environmental Economics: General