This year the IEB is publishing its second World Report on Fiscal Federalism. The editors of the report are the IEB researchers and University of Barcelona professors Núria Bosch and Albert Solé-Ollé.The report is published on an annual basis and includes contributions from expert authors in the field both from the IEB and from other universities, research centres, government bodies and agencies in Spain and abroad.The purpose of the report is to contribute to the debate on the design of multi-level governments by bringing together academic analysis and policy-making expertise.