“…Model selection using AIC (Akaike's Information Criterion) ( [1], [2], Chapter 3 in [3],Chapter 2 and Chapter 7 in [4], Chapter 2 in [5]) coincides asymptotically with selection using cross-validation ( [6], [7], [8], [9], [10], [11]); a more recent and sophisticated study on this matter is [12]. However, this is an asymptotic result and is based on several assumptions; when dealing with practical data analysis, it is often not clear whether using AIC is the same as using cross-validation.…”