This is a Festschrift to honour Professor Melvin Greenhut who has long toiled on spatial economics. The book accordingly focuses on a single question: in what sense 'economic space' matters in economic theory. Space in economics is an elusive concept, apparently separating and embracing economic agents at the same time. This is why adding it to already overly complicated economic agents at the same time. This is why adding it to already overly complicated economic models may not necessarily help economics to become sufficiently realistic. In this book, leading scholars of international stature try to find ways of introducing space in economic theory which will make it simpler and more realistic, analysing theoretical and historical issues of contemporary relevance, such as land use, congestion and public goods, location theory and spatial competition.