1. Professor, Dept. of Civil Engineering, Peruvian Univ. of Applied Sciences, Prolongación Primavera 2390, Surco, Lima 33, Peru (corresponding author).
2. Professor, Dept. of Architectural Constructions II, Univ. of Seville, Avd. Reina Mercedes, 4, CP: 41012 Seville, Spain.
3. Professor, Marketing Area, ESAN Univ., Jr Alonso de Molina 1652, Surco, Lima 33, Peru.
4. Professor, Dept. of Social Psychology and Methodology of Behavioral Science, Univ. of Granada, c/Rector López Argüeta s/n, CP: 18007 Granada, Spain.