=1 if sold
date auctioned year (decimal format)
years old = date_auctn - creation
real premium price = real hammer price + percentage markup, $1000
real hammer price = real sale price, $1000
real auction house low estimate, $1000
real auction house high estimate, $1000
average of rhigh and rlow estimates, $1000
height in inches
width in inches
square inches
=1 if signed by artist
year painting created
age of artist when painting created
year of artist birth
year.month
daily time trend, jan 1 1987 = 1 to dec 31 2008
=1 if artist = 1
=1 if artist = 2
=1 if artist = 3
=1 if artist = 4
=1 if artist = 5
=1 if artist = 6
=1 if artist = 8
=1 if medium = 0
=1 if medium = 1
=1 if medium = 2
=1 if medium = 3
=1 if medium = 4
=1 if medium = 5
=1 if medium = 6
=1 if medium = 7
=1 if medium = 8
=1 if medium = 9
=1 if sold during recession
=1 if 1987 <= year sold <= 1991
=1 if 1992 <= year sold <= 1996
=1 if 1997 <= year sold <= 2000
=1 if 2001 <= year sold <= 2004
=1 if 2005 <= year sold <= 2008