Micro firms are less involved in competence development than larger companies. Only 24% of theemployed in micro firms as well as for solo entrepreneurs were involved in competence developmentin 2008 compared 48 - 59% of the employed in large companies.This paper takes its point of departure in an ongoing research project with the purpose to study howcompetence development interventions affect the development of micro firms. The purpose is toanalyze effects for participating micro firms on firm, individual and indicator levels. The basis forthe research is an extensive EU-funded competence development projects concerning micro firmscalled Företagsakademin2.