Sharing economy decentralizes traditional way of organizing economic activities, especially in property markets and service industry, examples include taxi services like Uber and Didi, home-shares via Airbnb, and peer-to-peer lending like Zopa and Lending Club, all of which have millions of enthusiastic users but also are facing intense critics. This course provides an introduction that describes and analyse the underlying mechanism and prevailing practice of the peer-to-peer businesses. We will cover the functioning of various sharing platforms related to housing services, transportation services, and p2p lending services, different matching mechanism and pricing strategies employed by platforms, social welfare issues and the impact on labour market, as well regulatory developments and policy matters.