%0 Journal Article %T The impact of income gap on the inverted U-shaped total factor productivity and its mechanisms: Evidence from transnational-level analysis %A He, Weiwei %A Zhang, Yabin %A Zhong, Yuan %A Chen, Juanjuan %J PLoS ONE %V 15 %N 1 %D 2020-01-28 %I Public Library of Science %~ DeepDyve