[1] Univ Naples Parthenope, Dept Law, Via G Parisi 13, I-80132 Naples, Italy
[2] Univ Castilla La Mancha, Dept Polit Econ & Publ Finance, Econ & Business Stat & Econ Policy, C Altagracia 50, Ciudad Real 13071, Spain
[3] Univ Alicante, Dept Appl Econ, Carretera San Vicente Raspeig S-N, San Vicente Del Raspeig 03690, Spain
[4] Univ Naples Parthenope, Dept Econ & Legal Studies, Via G Parisi,13, I-80132 Naples, Italy