This document provides information about Tekes' 2015 innovation research call on the theme of "Platform Economy - Innovation ecosystems for digital revolution". It discusses the reasoning behind the call theme, outlines two main research themes and sub-topics to be addressed, and provides guidance on applying for funding. The call aims to develop expertise around value creation in platform ecosystems and leverage ecosystem development through innovation policy. High-quality, multidisciplinary projects that engage stakeholders and show policy and business impacts will be prioritized for funding.