This project will use tools from the field of microeconomics to develop new strategies for modeling cooperation, coordination and loyalty, in the digital economy and beyond. The project adopts a largely theoretical viewpoint but will test some of the ideas via a series of laboratory experiments and empirical analysis using real world data. The main applications include crowdfunding, where funders want to coordinate to invest in good projects and avoid wasted inspection costs, coalitions where members need to take account of externalities from and on other groups, coordination platforms that empower people to stand up for their rights, loyalty where firms seek to maintain customer loyalty but are unable to commit fully to the terms they want to promise.