An Empirical Investigation on Consumer Credit Default Risk

This paper explores the relationship between consumer credit clients’ payment performance i.e. credit default risk and some demographic and financial variables. Data to examine this relationship is obtained from the customer records of a private bank in Turkey. A logistic binary regression is used to evaluate the data. Financial variables rather than the demographic characteristics of clients have a significant influence on customers’ pay back performance. Thus, the longer the maturity time, the higher the interest rate, and the higher the credit default risks. This suggests bankers apply appropriate adjustments to financial variables in order to minimize credit default risk.

Constraints on differential Shapiro delay between neutrinos and photons from IceCube-170922A

On 22nd September 2017, the IceCube Collaboration detected a neutrino with energy of about 290 TeV from the direction of the gamma-ray blazar TXS 0506+056, located at a distance of about 1.75 Gpc. During the same time, enhanced gamma-ray flaring was also simultaneously observed from multiple telescopes, giving rise to only the second coincident astrophysical neutrino/photon observation after SN 1987A. We point out that for this event, both neutrinos and photons encountered a Shapiro delay of about 6300 days along the way from the source. From this delay and the relative time difference between the neutrino and photon arrival times, one can constrain violations of Einstein's Weak Equivalence Principle (WEP) for TeV neutrinos. We constrain such violations of WEP using the Parameterized Post-Newtonian (PPN) parameter $\gamma$, which is given by $|\gamma_{\rm {\nu}}-\gamma_{\rm{EM}}|<5.5 \times 10^{-2}$, after assuming time difference of 175 days between neutrino and photon arrival times.Comment: 5 page