“…(2) Independent variables Off-farm employment and part-time employment were used to measure the migration of labor force from rural to urban areas. Wherein, off-farm employment are defined in accordance with the research from Ji et al [34]; Huang et al [35], Che [49], Deng et al [50,51], Liu et al [52], Liu et al [53], Ma et al [54], referring to the individual laborers working outside their hometown villages for at least half a year; part-time laborers refers to the labor force engaged in agricultural production and non-agricultural work in a year. Additionally, in order to weaken the influence of missing variables on the estimation of model results, referring to the research from Ji et al [34]; Huang et al [35], Che [49], Shi et al [55], this study selects head education, head age, household labors, land area, agricultural assets and fixed assets as the control variables of this study (Table 1).…”