Vili Lehdonvirta

virtual currency virtual goods virtual economy mobile microwork mmo tablet games crowdsourcing social games virtual items f2p castronova vili lehdonvirta virtual economists economics revenue model virtual world trade social statistics monetization crowd investment innovation micropayments ict ecosystem game culture digital distribution policy crowdfunding mobile games gdc game design online games ict4d development entrepreneurship gold farming japan translation mum2010 consumer behavior mmos market size breakingmagiccircle mmorpg gamestudies hiit