Among the myriad of types of structures breeding startups (incubators, accelerators, etc.), a new successful model has emerged: the startup studio. Brand new, this model is already controversial, as show the announced IPO of Rocket Internet. Here is how we see the startup studio model: as being a 3rd co-founder. You can reed the full version on our blog: http://efounders.co/blog/startup-studio-the-3rd-co-founder-model/