This series provides definitive overviews of research methods in important fields of social science, including economics, business, finance and policy studies. The aim is to produce prestigious high quality works of lasting significance. Each Handbook consists of original contributions by leading authorities, selected by an editor who is recognised leader in the field. The emphasis is on the practical application of research methods to both quantitative and qualitative evidence. The Handbooks will assist practising researchers in generating robust research findings that policy-makers can use with confidence. While the Handbooks will engage with general issues of research methodology, their primary focus will be on the practical issues concerned with identifying and using suitable sources of data or evidence, and interpreting source material using best-practice techniques. They will review the main theories that have been used in applied research, or could be used for such research. While reference may be made to conceptual issues and to abstract theories in the course of such reviews, the emphasis will be firmly on real-world applications.