A Cost Analysis Curve-Fitting Program

Published 1976

by H. E. Boren, G. W. Corwin


Download eBook for Free

FormatFile SizeNotes
PDF file 3.9 MB

Use Adobe Acrobat Reader version 10 or higher for the best experience.


Purchase Print Copy

 Format Price
Add to Cart Paperback124 pages $30.00

Describes a FORTRAN-IV curve-fitting computer program (CURVES) that makes least-squares determinations of the parameters of any of eight types of equations selected by the user, given a set of observations on the dependent and independent variables of interest. The types of equations that can be fitted are: linear, quadratic, power, asymptotic-power, exponential, logarithmic-linear, and two types of semilogarithmic-linear. Except for the quadratic and asymptotic-power equations, up to seven independent variables may be used. Y-intercepts may be specified for all equations except the power and exponential. Various types of variable transformations are allowed. correlation matrix of the input data is provided for all fitted equations using more than one independent variable. Also included are standard errors and Student's t-ratios of the parameters, significance levels, beta coefficients, the Durbin-Watson statistics, and the variance-covariance matrix of the parameters. A plot routine is also incorporated. The program is fairly small (about 92,000 bytes of core when H compiled), fast in execution time, and hence cheap to operate.

This report is part of the RAND report series. The report was a product of RAND from 1948 to 1993 that represented the principal publication documenting and transmitting RAND's major research findings and final research.

This document and trademark(s) contained herein are protected by law. This representation of RAND intellectual property is provided for noncommercial use only. Unauthorized posting of this publication online is prohibited; linking directly to this product page is encouraged. Permission is required from RAND to reproduce, or reuse in another form, any of its research documents for commercial purposes. For information on reprint and reuse permissions, please visit

RAND is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.