© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved.© Copyright 2015 National Council on Compensation Insurance, Inc.

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Presentation transcript:

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved.© Copyright 2015 National Council on Compensation Insurance, Inc. All Rights Reserved. Presented by: Tony DiDonato, FCAS, MAAA Director & Senior Actuary, NCCI C.A.S.E. March 24, 2015 Boca Raton, FL Experience Rating for Workers Compensation: A Look Back at the First Century

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. Experience Rating for Work Comp Introduction  Experience Rating for Workers Compensation (WC) was in use by 1915  This presentation highlights some of the major features of the WC experience rating plans over the years and how they’ve changed  The focus of this review is on:  NCCI ER Plans, although several predecessor plans will also be discussed  Major features and high-level formula changes 2

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 3 The Year Was

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 1916: Plan A  Adjusted Loss Ratio (LR) was first computed using the following severities:  Indemnity: (Actual weekly award) x (Assumed avg weeks by injury type)  Medical: Assumed avg med cost by injury type  Neutral zone: 40-65% … no Mod  Formula (not subject to Schedule Rating) LR < 40%: % Credit = (40-LR)/40 x 25* LR > 65%: % Debit = (LR-65)/35 x 25* … capped at 25%  Issue - didn’t distinguish between risk sizes  Large risks with LR just above 40% got no credit  Small risks with near-zero claim expectation got large credit *Max credit/debit used (rather than 25%) if subject to schedule rating … in which case the credit varied by risk size because the schedule rating max credit/debit varied by risk size; Max 40% credit for ER and schedule rating combined 4 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 5 The Year Was

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 1917: Plan B  Fatal and PTD injuries treated separately from others and a flat charge was used for their severity  All Other injury types treated similar to Plan A with the Neutral zone slightly changed to %  An overall Mod was derived by combining the results from these two injury groupings  Maximum credits and debits varied according to 7 size-of-rate groups 6 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 7 The Year Was

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 1918: Plan D  Actual losses now used but adjusted to level of rates (premiums) used in ER formulas  Fatal and PTD indemnity losses continue to be treated separately from the All Other injury grouping  Expected loss varied for each of these two groups and by size-of-rate (accomplished via Table B applied to premium)  Credibility introduced  Precursor of current plan  The following Mod formula was applied to each of the two separate injury groups: P + z(p – P), where: P = Manual Premium (expected loss) p = Indicated Premium (adjusted actual loss) z = P / (P + K)  The K-values varied by state and for the two different claim groups and were developed on the basis of judgment 8 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 9 The Year Was

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved (NCCI) Plan  Expected loss now varies by class  Overall Mod formula unchanged but z-credibility formula changed for the All Other injury group: z = (P + C) / (P + K + C)  However, z=1 (for both injury groups) if premium >= $80,000 (self-rated) 10 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 11 The Year Was

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved Plan  Actual and Expected loss split into primary and excess components  Actual split through the use of Table A “normal” values; excess portion of Fatal and PTD not used  Expected loss split by class through the use of Table B  Z-credibility calculation returns to: Z = P / (P + K) … separately for primary and excess loss  Credibility-weighted losses then calculated from: L = A*Z + E*(1-Z) separately for primary and excess loss  Mod adjustment = (L - E) / E L and E represent combined primary and excess loss  $80,000 self-rating point changed and made gradual 12 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 13 The Year Was

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved Plan  3 equally-weighted years of experience vs 5 weighted years being used since 1928  Indemnity and medical treated on a combined basis  Multi-split Plan introduced; formula assigns variable amount to primary depending on size of claim:  Primary portion of first $500 layer of claim = 500  Primary portion of next $500 layer of claim = 500(2/3)  Primary portion of next $500 layer of claim = 500(2/3) 2, etc. (Primary maxes out at 1500 in above)  ELRs and D-ratios introduced 14 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved Plan …continued …  Weights and Ballasts introduced as a new way to reflect credibility; a risk = 3 times eligibility threshold would get a max 25% debit for a single claim  Underlying Z p changed again: Z p = E / (E p +WE e +B) Z e = W*Z p  Mod =A p + B + W*A e E p + B + W*E e  W=0 for risks with E < 2 x (Fatal and PTD avg benefit value) … thus, for majority of risks: Mod =A p + B E p + B 15 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 16 The Year Was

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved Plan  Current version of Mod formula adopted: Mod =A p + W*A e + (1-W)*E e + B E + B  Primary = Actual Loss x 3,750 Actual Loss + 3,000 if Actual Loss <750, then all primary (primary maxes out at 3,750 in above)  Underlying formula for primary credibility once again reverts back to: Z p = E/(E+B) 17 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 18 The Year Was

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved Plan Primary Loss redefined as: Primary = Actual Loss x 10,000 Actual Loss + 8,000 if Actual Loss <2000, then all primary (primary maxes out at 10,000 in above) 19 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 20 The Year Was

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 1991: RERP (Revised Experience Rating Plan)  Primary Loss redefined again … single split point used: Primary = first $5,000 of each claim 21 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 22 The Year Was

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 1998: ERA (Experience Rating Adjustment)  Medical-only claims reduced by 70%  Reduction comes after the primary/excess split applied  E.g. A $7,000 med-only claim would result in $1,500 primary and $600 excess  Proposed indexing the split point as needed 23 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 24 The Year Was CAS Celebrates Centennial Next Year! Plan To Attend The CAS Centennial Celebration is not your average Annual Meeting! Plan to attend this once-in-a- lifetime event and help celebrate 100 years of expertise, insight, and solutions. The celebration will take place at the NY - Hilton Midtown in New York City, November 9- 12, Meeting Overview On November 7, 1914 the Casualty Actuarial and Statistical Society held its first meeting in New York City with 97 charter members as Fellows. Now 100 years later with more than 6,200 members, the Casualty Actuarial Society is back in the Big Apple to celebrate our first century and explore the challenges and opportunities that face us in the next. THE DAILY PLANET THE WORLD’S FAVORITE NEWSPAPER 2013 Edition

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved. 2013: E-1402 (Increase and Index of Split Point)  $5,000 split point increased to $15,000 plus severity indexation  A 3-year transition utilized  2013 split point: $10K  2014 split point: $13.5K  2015 split point: $15.5K  2016 and subsequent: severity-indexed value 25 Experience Rating for Work Comp

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved.© Copyright 2015 National Council on Compensation Insurance, Inc. All Rights Reserved. Thank You!