This book constitutes the refereed proceedings of the 11th International Conference on Economics of Grids, Clouds, Systems, and Services, GECON 2014, held in Cardiff, UK, in September 2014. The 8 revised full papers and 7 paper-in-progress presented were carefully reviewed and selected from 24 submissions. The presentation sessions that have been set up are: Cloud Adoption, Work in Progress on Market Dynamics, Cost Optimization,Work in Progress on Pricing, Contracts and Service Selection, and Economic Aspects of Quality of Service.