Using your regular contacts as collateral: The information value of call logs

• We apply a novel dataset that combines the loan data with mobile phone usage data. • The more external social ties reduce the interest rates charged for loans. • The higher frequency of calls in the morning predicts the lower default degree. • P2P platforms are suggested to assign differing weights to the types of calls. This paper aims to uncover the deterrent effect of external social ties on online peer-to-peer lending by extracting...