I recently asked a question where this answer would fit - https://news.ycombinator.com/item?id=19627404

We have tried this with 3 different candidates: 1. No experience last year in university 2. No experience with BS 3. 1 year working experience

My experience with this approach is that it is a far more expensive investment that takes long time to pay off. The safe ratio that I can recommend is 5 seniors to 1 junior