Encyclopedia of Biostatistics (2nd Edition) 2005 HKS Authors See citation below for complete author information. Joseph Newhouse John D. MacArthur Research Professor of Health Policy and Management Citation Newhouse, Joseph P. "Instrumental Variables in Health Services Research." Encyclopedia of Biostatistics (2nd Edition). Ed. Peter Armitrage and Theodore Colton. John Wiley & Sons, 2005, 2561-2565.