\section{Motivation}
Jacky.. notes on the historical debate re effort estimation. shepperd tse 2002, 2005. kitchenham 2004. why, in theory, all these measures are different.

also, please include notes on why LOOCV may give different results to 10*3-way
\url{http://www.faqs.org/faqs/ai-faq/neural-nets/part3/section-12.html}.

also, note that ekrem is defining all the measures is in ../../comba/ekrem/stats.tex
