1. Universidade Federal de Sa˜o Paulo (UNIFESP) – Instituto Tecnolo′gico de Aerona′utica (ITA), Sa˜o Jose′ dos Campos, Brazil
2. Manchester Metropolitan University Business School, Manchester, UK
3. ITA – Instituto Tecnolo′gico de Aerona′utica, Bolsista CNPq, Sa˜o Jose′ dos Campos, Brazil