This study aims to explore ecological indexes for identifying roles of ICT industries in the mobile ecosystem using inter-industry analysis.

Four ecological indexes have been developed based on the result of inter-industry analysis: productivity, size, spillover effect, and coverage.

We identified six roles for ICT industries: commodity, landlord, controller, keystone, facilitator, and dominator.

The implications are deployed focusing on the landlord which might destroy the entire ecosystem by extracting too much value from others in the case of Korea.