环渤海地区滴灌的资源与经济效应——政府与农户目标一致性检验
张哲晰,穆月英,侯玲玲,杨鑫

Resource and economic effects of drip irrigation in the Bohai Rim area: Consistency of goals of the government and farmers
Zhexi ZHANG,Yueying MU,Lingling HOU,Xin YANG
图1 倾向得分的共同取值范围
Figure 1 Common support of propensity scores