[1] St Josephs Univ, Haub Sch Business, Dept Management, Philadelphia, PA 19131 USA
[2] Rio Grande Norte State Univ UERN, Dept Econ, BR-59633010 Mossoro, RN, Brazil
[3] Univ Fed Santa Catarina, Prod & Syst Engn Dept, BR-88010970 Florianopolis, SC, Brazil