This study investigates the role of owners' personal preferences and behaviour in determining the success of micro, small and medium-sized enterprises using a lab-in-the-field experiment with small-business owners in Myanmar. The study is a complement to a 2017 quantitative survey conducted within the project 'Towards inclusive development in Myanmar'. The lab-in-the-field experiment comprised five behavioural games: dictator, bargaining, trust, public goods, and risk-preference elicitation.