MAS-II case studies
MAS-II · Put your knowledge to work in context.
Exam MAS-II is one of the actuarial exams administered by the Casualty Actuarial Society (CAS) and sits on the ACAS credentialing pathway alongside Exams 1 and 2 and Exam MAS-I. The CAS describes itself as the trusted global authority advancing property and casualty actuarial science, with nearly 12,000 members worldwide, and it lists MAS-II among the exams candidates must clear before progressing to the fellowship-level Exams 7, 8, and 9. The MAS-II case studies are 5 cases and about 4,994 words.
1Bühlmann–Straub Credibility for a Four-Class Commercial Auto Book
You are the pricing actuary for a regional commercial auto carrier whose four rating classes were last repriced three years ago. Your analyst has assembled four accident years of experience and fitted a Bühlmann–Straub credibility model with exposure measured in vehicle-years.
1,042 words, about 5 min2Overdispersion in a Motorcycle Frequency Filing
You are peer-reviewing a motorcycle frequency filing. The model is a Poisson GLM with a log link and an offset of log(exposure), fitted to 24 months of data aggregated into 412 cells (territory × model year × rider age band × usage).
1,012 words, about 5 min3Forecasting Monthly Claim Counts Through a Reporting-System Change
Monthly private passenger auto claim counts from January 2015 to December 2022 (96 observations) underpin the 2023 frequency forecast. Frequency shows a winter peak in January–February and a smaller July peak.
996 words, about 5 min4MCMC Diagnostics in a Hierarchical State Frequency Model
Your team is producing state-level frequency indications for a 15-state homeowners program using a hierarchical Poisson–lognormal model: claim counts ~ Poisson(exposure × θₛ), with log θₛ ~ Normal(μ, σ). Sampling used four chains of 2,000 warm-up and 2,000 sampling iterations each.
929 words, about 5 min5Severity Modelling with Policy-Limit Censoring
You are pricing the occurrence limit for a general liability portfolio at 250,000 per occurrence, ground-up. The experience file holds 8,400 closed claims from five accident years.
1,015 words, about 5 min