1. Researcher, Center of Agribusiness Studies – CEPAN, Universidade Federal do Rio Grande do Sul, Porto Alegre (UFRGS), Avenue Bento Gonçalves 7712, CEP 91540-000, Porto Alegre, RS, Brazil.
2. Researcher, Department of Animal Science (Zootecnia), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Avenue Bento Gonçalves 7712, CEP 91540-000, Porto Alegre, RS, Brazil.
3. Researcher, Instituto Nacional de Investigación Agropecuaria (INIA). Programa Producción de Carne y Lana. Estación Experimental INIA La Estanzuela. Ruta 50 km 11, 39173, Colonia, Uruguay.
4. Professor, Department of Economic Science and Center of Agribusinnes Studies – CEPAN, Universidade Federal do Rio Grande do Sul, Porto Alegre (UFRGS), Avenue João Pessoa 52, CEP 90040-000, Porto Alegre, RS, Brazil.
5. Professor, Department of Animal Science (Zootecnia) and Center of Agribusinnes Studies – CEPAN, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Avenue Bento Gonçalves 7712, CEP 91540-000, Porto Alegre, RS, Brazil.