TY  - JOUR
A1  - Kotha, Sreeram Reddy
A1  - Bazzurro, Paolo
A1  - Pagani, Marco
T1  - Effects of epistemic uncertainty in seismic hazard estimates on building portfolio losses
JF  - Earthquake spectra : the professional journal of the Earthquake Engineering Research Institute
N2  - In catastrophe risk modeling, a defensible estimation of impact severity and its likelihood of occurrence to a portfolio of assets can only be made through a rigorous treatment of uncertainty and the consideration of multiple alternative models. This approach, however, requires repeating lengthy calculations multiple times. To limit the demand on computational time and resources, a frequent practice in the industry is to estimate the distribution of earthquake-induced portfolio losses using a simulated catalog of events from a single representative mean ground motion hazard model for the region. This simplified approach is faster but may provide biased estimates of the likelihood of occurrence of the large and infrequent losses that drive many risk mitigation decisions. Investigation through case studies of different portfolios of assets located in the San Francisco Bay Region shows the potential for both a bias in the mean loss estimates and an underestimation of their central 70% interpercentile. We propose a simplified and computationally practical approach that reduces the bias in the mean portfolio loss estimates. This approach does not improve the estimate of the interpercentile range, however, a quantity of no direct practical use.
Y1  - 2018
U6  - https://doi.org/10.1193/020515EQS020M
SN  - 8755-2930
SN  - 1944-8201
VL  - 34
IS  - 1
SP  - 217
EP  - 236
PB  - Earthquake Engineering Research Institute
CY  - Oakland
ER  -