Harrison-Rubinfeld data

  Variables:
  CRIM     per capita crime rate by town
  ZN       proportion of residential land zoned for lots over 25,000 sq.ft.
  INDUS    proportion of non-retail business acres per town
  CHAS     Charles River dummy variable (= 1 if tract bounds river; 0 otherwise)
  NOX      nitric oxides concentration (parts per 10 million)
  RM       average number of rooms per dwelling
  AGE      proportion of owner-occupied units built prior to 1940
  DIS      weighted distances to five Boston employment centres
  RAD      index of accessibility to radial highways
  TAX      full-value property-tax rate per $10,000
  PTRATIO  pupil-teacher ratio by town
  B        1000(Bk - 0.63)^2 where Bk is the proportion of blacks by town
  LSTAT    % lower status of the population
  MEDV     Median value of owner-occupied homes in $1000's
  x-coord  latitude centroid of the census tract
  y-coord  longitude centroid of the census tract


NOTE: The latitude and longitude coordinates were supplied
by: Gilley, O.W., and R. Kelley Pace, 1996. ``The Harrison and Rubinfeld
Data Revisited'', Journal of Environmental and Economic Management,
Vol. 31, no. 3, pp. 403-405.