The Sage website, including online ordering services, may be unavailable due to system maintenance on September 13th and September 14th between 6:00 pm and 12:30 pm PDT. If you need assistance, please visit our Contact us page for further information.
Thank you for your patience and we apologise for the inconvenience.
Jeffrey B. Cromwell Design of Harmony (Chandler, AZ), West Virginia University, USA
Dr. Jeff B. Cromwell is a graduate of West Virginia University with research interests in computational statistics, econometrics and time series analysis.