机译:中国生猪生产的技术效率及其决定因素
Col ege of Economics and Management, Nanjing Agricultural University, Nanjing 210095, P.R.China;
Col ege of Economics and Management, Nanjing Agricultural University, Nanjing 210095, P.R.China;
Col ege of Economics and Management, Nanjing Agricultural University, Nanjing 210095, P.R.China;