"Written by the world's leading specialists, these papers are uniquely positioned to become authoritative accounts of the current state of the art in...areas of econometric research....a welcome addition to the econometrics literature. The authoritative surveys in this volume...will undoubtedly be an important source of reference for new entrants to the field. The contents of these surveys should also be of interest to specialists. I recommend this volume...enthusiastically." Baldev Raj, Mathematical Reviews