I fail to see that in these links. I think a more appropriate set of citations would be:
basic research
http://www.religioustolerance.org/spanking_menu.htm
against corporal punishment as an educative method
http://www.apa.org/about/governance/council/policy/corporal- punishment.aspx
http://www.nospank.net/vcb.htm
http://www.religioustolerance.org/spankin4.htm
http://www.religioustolerance.org/spankin29.htm
for corporal punishment as an educative method
http://www.corpun.com/ukju9803.htm
http://www.corpun.com/10archive/ukd01001.htm#21929
I personally find a lack of serious psychological research that finds correlation between corporal punishment and increase of quality of life in the society where it is practiced. That observation makes me believe that this practice should be abolished, or severely restricted at least.