“…The income or consumption per capita of farm households who conduct non-farm activities has generally been 5-25% higher than those that do not, depending on the type and scale of their non-farm activities [23,29,[34][35][36]. Some households used a fraction of their additional income for farming investments, such as buying equipment or crop diversification [37,38], that in turn increased income from farm activities. Nowadays, non-farm activities, supported by government policies aiming at a development of the rural economy, have become important sources of income across rural areas of Vietnam [39,40].…”