TY - JOUR T1 - Returns to scale and curvature in the presence of spillovers: evidence from European countries JO - Oxford Economic Papers UR - http://dx.doi.org/10.1093/oep/gpv052 PY - 2015/08/10 AU - Glass AJ AU - Kenjegalieva K AU - Sickles RC ED - DO - DOI: 10.1093/oep/gpv052 PB - Oxford University Press (OUP) VL - 68 IS - 1 SP - 40 EP - 63 Y2 - 2024/12/26 ER -