Behavioral Economics and the Brain- Time and SelfControl

Please read two articles and answer following questions.
-Ballard/
1)What are the Magnitude effect and Hidden zero effects?
2)How were the authors expecting the Magnitude effect and Hidden zero effect to change with DLPFC TMS?
-Kable/
1)What is the biggest difference between the ASAP model proposed in the paper and the hyperbolic model?
2)How does this model support the idea of a unitary representation of SV?