/usr/share/gretl/scripts/ps4-4.inp is in gretl-common 2016a-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 | # PS4.4, for Table 4.4 and the application in Section 4.6
open data4-4
ols BUSTRAVL 0 FARE GASPRICE INCOME POP DENSITY LANDAREA
# omit variables -- Model B
omit GASPRICE LANDAREA FARE
# estimate full model and omit variables one at a time
ols BUSTRAVL 0 FARE GASPRICE INCOME POP DENSITY LANDAREA
# Model C
omit GASPRICE
# Model D
omit LANDAREA
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