Software Reviews : RATS (Regression Analysis of Time Series) with E-Z-RATS, Version 1.20 Reviewed by Mei-chu W. Hsiao, University of Colorado at Denver Publisher: VAR Econometrics, 134 Prospect Avenue South, Minneapolis, MN 55419 (telephone: 612-822-9690) Year of Publication: Copyright 1985, 1984 Materials: 4 disks of RATS (or RATSLM) large memory version, 3 disks of RATSSM standard version (small memory), RATS and RATS5M Installation Guides, and RATS User's Manual, version 4.30 Price: $300.00 for RATS large memory version (additional $20.00 for a copy of RATSSM for use on the same machine). $200.00 for RATSSM standard version (additional $50.00 for graphics driver). Availability: IBM-PC, XT, AT or PC-compatible System Requirements: 256K of memory for RATSSM or 384K of memory for RATS, Ms or PC-DOS 2.0 (or higher) operating system, 2-diskette drives with 320KB or a hard disk, with or without 8087 (or 80287) numerical processor chip, and Ism color graphics board or compatible boards for graphics. Effectiveness: Excellent User-Friendliness: Good Documentation: Excellent