Before revision: The paper proposes a new high-dimensional algorithm , the Groupwise Interpretable Basis Selection (GIBS) algorithm  to estimate a new Adaptive Multi-Factor (AMF) asset pricing model, implied by the recently developed Generalized Arbitrage Pricing Theory, which relaxes the convention that the number of risk-factors is small.
After revision: The paper proposes a new high-dimensional algorithm , the Groupwise Interpretable Basis Selection (GIBS) algorithm , to estimate a new Adaptive Multi-Factor (AMF) asset pricing model, implied by the recently developed Generalized Arbitrage Pricing Theory, which relaxes the convention that the number of risk-factors is small.