joining me now are columbia business school associate professor, don weiss and his student, matt burger. thanks so much for being here. you're an entrepreneur and business school professor. i just wonder, what is it like going into another culture, taking a deep dive? what do you learn about why do it? >> we picked up a lot of lessons in cape town, south africa. things that were different about african culture and things that were different in africa, but also things different about starting and running a business that are the same regardless of where you are in the world. >> what's a common thread? something entrepreneurs every have in common? >> passion. for one. focus, hopefully. perseverance. >> matt, you worked on wall street, but said this was a life changine ining experience. >> it was interesting for me seeing how the start up jeb ration has been booming here in the u.s. how different it was to see people doing you know, what i see here in new york in a place like south africa and what the challenges were and how they were different. the gentleman that we met with, that we worke