COMMENT --------------------------------------- Betahat - nelson ---------------------------------------
INPATH C:\Projects\Code\Beta\Benchmarks\Nonlinear
OPEN nelson_NIST.PRN
USE 1 128
GENR LOGY = LOG(Y)
NLS  logy b1-b2*x1 * exp(-b3*x2)    /  INPUTB B1=2 B2=0.0001 B3=-0.01 
NLS  logy b1-b2*x1 * exp(-b3*x2)    /  INPUTB B1=2.5 B2=0.000000005 B3=-0.05 

COMMENT --------------------------------------- Nist - nelson ---------------------------------------
'Source is http://www.itl.nist.gov/div898/strd/nls/data/nelson.shtml
COMMENT 
COMMENT           Starting values                  Certified Values
COMMENT 
COMMENT         Start 1     Start 2           Parameter     Standard Deviation
COMMENT   b1 =    2           2.5          2.5906836021E+00  1.9149996413E-02
COMMENT   b2 =    0.0001      0.000000005  5.6177717026E-09  6.1124096540E-09
COMMENT   b3 =   -0.01       -0.05        -5.7701013174E-02  3.9572366543E-03
COMMENT 
COMMENT Residual Sum of Squares:                    3.7976833176E+00
COMMENT Residual Standard Deviation:                1.7430280130E-01
COMMENT Degrees of Freedom:                               125
COMMENT Number of Observations:                           128
COMMENT