Investigating effects of social media news sharing on the relationship between network heterogeneity and political participation

Highlights：

• We examined the link among news sharing, network heterogeneity and political participation.

• We revealed two sub-dimensions of news sharing: externalizing and internalizing.

• News internalizing affects participation, but only indirectly via externalizing.

• News externalizing moderates between network heterogeneity and participation.