Modern European economic history is marked by an endeavour to transcend the traditional national case study approach, to use comparisons and to deploy economic theory in order to draw the manifold and diverse experiences of the regions, countries and multicultural empires of Europe onto a unified frame of reference. These two volumes exemplify this modern approach. This Volume 4 of the eleven part set entitled Industrial Revolutions contains thirteen papers, with an introduction, which adopt and apply a conceptual and explicitly comparative approach to European economic history as a whole. Volume 5 includes sixteen national case studies, again organized around or set within the context of theoretical principles and ideas derived largely from macroeconomic theory, social accounting, productivity measurement and regional analysis.