Germán Martínez Velasco, in his doctoral thesis 1999, asked why people from Chiapas, in contrast to those from Oaxaca, did not emigrate looking for working opportunities out of their state.
Germán Martínez Velasco se preguntaba en su tesis doctoral 1999 por qué los chiapanecos, a diferencia de los oaxaqueños, no emigraban en busca de oportunidades laborales fuera de su estado.