How effectively do you think Katie Beauchamp and Hayley Barna used their time in college to advance their business idea?

Katie Beauchamp and Hayley Barna met on their first day at Harvard Business School. They volunteered to co-coordinate a spring holiday for themselves and 50 of their classmates. Through the experience they realized that they worked well together as a team, but at that time, they had no thought of cofounding a business. That all changed just over a year later, when Beauchamp and Barna launched Birchbox, a beauty samples subscription service that now has over one million monthly subscribers in five countries.