Book Review: The Concept of State Aid under EU Law: From Internal Market to Competition and Beyond, First Edition, by Juan Jorge Piernas López. (Oxford: Oxford University Press, 2015) - World Competition View Book Review: The Concept of State Aid under EU Law: From Internal Market to Competition and Beyond, First Edition, by Juan Jorge Piernas López. (Oxford: Oxford University Press, 2015) by - World Competition Book Review: The Concept of State Aid under EU Law: From Internal Market to Competition and Beyond, First Edition, by Juan Jorge Piernas López. (Oxford: Oxford University Press, 2015) 39 3 World Competition