1. Department of Mathematics and Statistics Universidad de La Frontera Temuco Chile
2. School of Industrial Engineering Pontificia Universidad Católica de Valparaíso Valparaíso Chile
3. Department of Statistics Pontificia Universidad Católica de Chile Santiago Chile
4. Department of Statistics Universidade de Brasília Brasília Brazil
5. Faculty of Administration, Accounting and Economics Universidad Federal de Goiás Goiania Brazil