Top Modeling Stories in GC Capital Ideas: First Half 2012
Here we highlight the top stories on modeling that have appeared in GC Capital Ideas in the first six months of 2012.
1. Spatial and Temporal Earthquake Clustering - Earthquake Aftershocks, EQECAT Perspective: Forecast Models: Earthquake sequences appear to be globally continuous over time. This suggests that seismic sources or faults may be part of a critically-stressed, self-organized network where earthquakes occur as a chain reaction with respect to one another. Earthquakes trigger other earthquakes as stresses move around in the fault network.
2. Spatial and Temporal Earthquake Clustering - Earthquake Aftershocks, EQECAT Perspective: Probabilistic Hazard Analysis: The purpose of probabilistic seismic hazard analysis (PSHA) is to quantify the rate (or probability) of exceeding various ground-motion levels at a site or sites, given all possible earthquakes. PSHA involves the following three steps: Characterization of the seismic-hazard source model(s); Specification of the ground motion model(s) or attenuation relationship(s); and Probabilistic calculation.
3. Spatial and Temporal Earthquake Clustering - Earthquake Aftershocks: EQECAT Perspective: Introduction: EQECAT recently released a white paper examining earthquake clustering in the context of seismic hazard and loss assessment. The paper, Spatial and Temporal Earthquake Clustering: Part 2 - Earthquake Aftershocks, is EQECAT’s second in a three-part series about spatial and temporal earthquake clustering.
4. Calling All General Insurance Reserving Actuaries: Does the Bootstrap Model “Work”? Guy Carpenter’s extensive back-testing of reserve distributions created using the popular paid chain ladder bootstrap method has shown that these distributions materially under-estimate reserve risk.
