J. Ortí, Francesc; Sáez, José; Terceño, Antonio - In: Fuzzy Economic Review VII (2002) 2, pp. 59-80
Markowitz's classical model, as well as other models derived from it (Tobin, Black, …), have raised the problem of the analysis and selection of portfolio securities using statistical instruments that assume a regular and efficient market. This is not usually the case. Although some authors...