The kdens2 routine (bivariate kernel density estimation with Gaussian
kernel, 3d plot using Mander's -surface- routine) has been updated to
correct an error in the density calculation. An improper divisor was
used in the computation. This does not affect the rendition of the
bivariate kernel density plot, but corrects the vertical axis labels.
Thanks to Maria Cecilia Calderon for pointing out the bug.
The revised -kdens2- is available from ssc or via adoupdate.