Paul's recent podcast, The Real Secret to Long-Term Investment Success, elicited many comments and questions at the Bogleheads forum (you can read the threads of conversation here) and from regular Sound Investing listeners. The following are questions addressed on this podcast.

What does Paul think of the factor funds at Vanguard? 4:10
What impact do momentum, quality, and volatility have on your recommendations? I suggest listeners check out Chris Pedersen's article and recommendations. 22:16
Where can I see long-term real-time results of the small-cap value asset class? 24:28
John Bogle said that there was no way for a small investor to invest in small-cap value in the 30s. Where can a small investor capture the results of the past? 31:08
If I add small-cap value to my portfolio how much will my risk go up? 34:40
Is there a similar portfolio to the 4-fund combo that includes international developed markets and emerging markets? 40:54
What are the historical trading costs and inefficiencies when trading small-cap value stocks? Are they taken into consideration in your studies? 42:52
Are there some "real life returns" that came close to what Paul claims the historical return has been? 46:35
“What has been your biggest mistake?” Rick Ferri asked Paul in an interview for an upcoming Bogleheads podcast (which will be replayed on Sound Investing). Paul speaks about one of the most common investor mistakes and mentions this video in his answer. 49:00
Will Paul likely go to his grave with small-cap value not living up to his expectations? Paul tells investor to be patient and they will receive the premium for investing in small-cap value. 56:53

90 Years of Evidence Shows Investor Patience Leads to Better Returns