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⭐WORKERS COMPENSATION RATEMAKING PROCESSES OF THE NATIONAL COUNCIL ON COMPENSATION INSURANCE, INC.
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1 WORKERS COMPENSATION RATEMAKING PROCESSES OF THE NATIONAL COUNCIL ON COMPENSATION INSURANCE, INC. JANUARY 20142 CONTENTS 1. Introduction... 1 Scope... 1 Overview of the NCCI Ratemaking Methodology... 2 General Approach to this Review Executive Summary... 7 Principal Conclusions... 7 Recommendations Discussion Statewide Rate Indication Distribution to Industry Groups Distribution to Individual Classifications Rating Values Documentation and Information Distribution and Use Considerations and Limitations Acknowledgement OLIVER WYMAN Table of Contents3 1 Introduction Scope Oliver Wyman Actuarial Consulting, Inc. (Oliver Wyman) has been engaged by the Office of Insurance Regulation, State of Florida, (the FLOIR) to conduct an independent actuarial peer review of the ratemaking processes of the National Council on Compensation Insurance, Inc. (NCCI), in Florida, as required by Section , Florida Statutes. 1,2 Specifically, Oliver Wyman has been engaged to review the following: 1. Methodologies, thought processes, judgments and assumptions used to determine statewide rate level changes, including, but not limited to: database (paid loss versus paid loss plus case reserve or other) loss development methodology and selections experience periods trend calculations premium development calculations premium adjustments benefit on-level adjustments expense provisions profit and contingencies provisions impact of experience rating off-balance 2. Methodologies, thought processes, judgments and assumptions used to distribute statewide rate level changes to industry groups. 3. Methodologies, thought processes, judgments and assumptions used to determine individual workers compensation classification rates. 1 Section states that:.. at least once every other year contract for an independent actuarial peer review and analysis of the ratemaking processes of any licensed rating organization that makes rate filings for workers compensation insurance, and the rating organization shall fully cooperate in the peer review. The contract shall require submission of a final report to the commission, the President of the Senate, and the Speaker of the House of Representatives by February 1. 2 NCCI is the licensed agency responsible for collecting statistical information submitting applications for revised workers compensation rates and rating values on behalf of NCCI s member or affiliated insurance companies. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 14 4. Methodologies, thought processes, judgments and assumptions used to determine the impact of legislative changes, benefit-level adjustments, and legislative proposals. 3 Overview of the NCCI Ratemaking Methodology The result of the workers compensation ratemaking process is a revised manual premium rate for each of over 500 individual workers compensation employer classifications. The final premium rate for an individual employer is the published manual workers compensation rate multiplied by the specific employer s experience modification. 4 NCCI maps classifications into five industry groups. 5 The premium rate for each classification incorporates the combined impact of statewide average experience, the experience of the industry group to which it belongs, and the experience of the individual classification itself. The NCCI ratemaking methodology employed in Florida is composed of four general steps: Step 1: Calculation of Statewide Rate Change The statewide rate change is the average rate change for all classifications combined. This step relies primarily on Aggregate Financial Call data. 6 Contributing elements to the statewide rate change include, but are not necessarily limited to: 3 Since implementation of SB 50A on October 1, 2003, there have been no material law changes affecting workers compensation costs in Florida with the exception of the Florida Supreme Court Decision, Emma Murray v. Mariner Health and ACE USA, and HB 903, which reversed the legislative impact of this court decision. The Murray decision effectively reversed a portion of SB 50A, resulting in an estimated (by NCCI) 6.4% expected increase to overall benefit costs in Florida effective October 23, NCCI estimated the impact of HB 903 to be a 6% decrease to overall benefit costs in Florida, effective July 1, 2009, effectively offsetting the cost impact of Murray. 4 Experience rating is the final step in the process of determining premium charges for individual employers. Experience rating recognizes that the premium rate for a specific classification represents the average premium rate for all employers in that classification. Experience rating is the process by which the premium rate, for a specific employer, is adjusted to reflect the employer s own loss experience relative to the average loss experience in the employer s classification. In its simplest form, experience rating is a measurement of an employer s actual loss experience to the employer s expected loss experience. Expected loss experience is based on the average premium rate, and therefore the average loss experience, of all employers in a classification. The result of the experience rating process is the experience modification. An experience modification greater than unity, or 1.000, is commonly referred to as a debit mod and means the specific employer has loss experience greater than the classification average. Conversely, an experience modification less than unity is commonly referred to as a credit mod and means the specific employer has loss experience less than the classification average. 5 The five industry groups are: Manufacturing, Contracting, Office and Clerical, Goods and Services, Miscellaneous 6 NCCI collects, tabulates, checks, and edits combined statewide workers compensation experience. NCCI collects data for use in an actuarial analysis to determine, on an average, statewide basis, whether rates need to be increased, or decreased. NCCI publishes detailed instructions as to how insurance carriers should respond to the various data requests. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 25 Loss Experience: Is the actuarial forecast of the final cost of benefits for a group of claims greater than or less than what is expected in current premium rates? Trend: 7 Are workers compensation benefits increasing at a rate greater than or less than wages? Benefit Changes: Have there been any changes to workers compensation benefits since the prior rate examination? Claim Adjustment Expense (LAE) 8 Is the expected cost of LAE greater than or less than the provision in current premium rates? Other Insurance Company Expenses: Is the expected cost of insurance company overhead and commission greater than or less than provisions in current premium rates? Taxes and Assessments: Is the expected cost of taxes and assessments greater than or less than the provisions in current premium rates? Profit and Contingencies: Is the economic/actuarial forecast of reasonable insurance company profit greater than or less than the provision in current premium rates? Step 2: Distribution of Statewide Rate Change to Industry Groups NCCI distributes the statewide rate change to each of the five industry groups based on the relative loss experience of each individual industry group. 9 The weighted average of the rate changes for each of the five industry groups must equal the 7 Premium rates are almost exclusively measured relative to payroll (in units of $100). There is an a priori assumption in premium rates that benefit costs (meaning the combined impact of changes to the number of claims, or frequency, and the cost per claim, or severity) will increase at the rate of wage inflation. Therefore, if actuarial analysis shows that benefit costs are increasing at a rate less than wage inflation, the indicated trend will be negative, or less than zero. Similarly, if actuarial analysis shows that benefit costs are increasing at a rate greater than wage inflation, the indicated trend will be positive, or greater than zero. If benefit costs are increasing at exactly the same rate as wage inflation, the indicated trend will be exactly zero. 8 Claim adjustment expense is commonly referred to as loss adjustment expense (LAE). LAE is the total cost of adjusting claims, including (in general) overhead costs of maintaining a claims adjustment staff and claim defense costs. Claim defense costs generally include, but are not limited to, legal fees, court fees, and the cost of investigations. Currently, NCCI partitions the provision for LAE into Defense and Cost Containment Expenses (DCCE) and All Other Expenses (AOE). DCCE is roughly comparable to expenses previously categorized as Allocated Loss Adjustment Expense (ALAE). AOE is roughly comparable to expenses previously referred to as ULAE. 9 For example, if the average statewide rate change is a 5.0% increase, and the manufacturing industry group has much greater loss experience than expected, while the other four industry groups have lower loss experience than expected, the manufacturing industry group might be allocated a 10% rate increase, while the other four industry groups might be allocated a 2% rate increase. The weighted average for all five industry groups must equal the statewide 5.0% increase. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 36 statewide rate change calculated in Step 1. The allocation to industry groups relies primarily on Workers Compensation Statistical Plan (WCSP) Data. 10 Step 3: Distribution of Industry Group Rate Changes to Classifications NCCI distributes the industry group change to each individual classification within the specific industry group. NCCI bases the distribution on the actual loss experience of each individual classification, and relies on WCSP data. The weighted average of the rate changes for all classifications in an individual industry group must equal the industry group rate change calculated in Step 2. Note that NCCI does not directly calculate classification rates. 11 Rather, the starting point in the NCCI ratemaking process is current manual rates. The process described in steps 1, 2, and 3 above represents a rate relativity system. An overall statewide rate need is determined by examining statewide combined data, which generates an indicated statewide rate level change in step 1. If not for consideration of rate relativities, the process would stop here, and NCCI would apply the same calculated rate change to the current rate for each classification. Steps 2 and 3, however, consider how the relative actual loss experience for each individual classification has changed since the prior rate application. In the simplest sense, if the most recently available data indicated that every classification, relative to each other, behaved exactly as expected, then the rate for every classification would be increased by the exact same amount, the calculated statewide rate change. This, of course, does not reflect reality, and illustrates the need for step 2 and step 3. These steps measure how the loss experience for each individual class changed relative to each other. This is why, even with very small or zero percent statewide rate change, some classifications might increase by 15%, and other classifications might decrease by 15% WCSP data is a database of individual claim experience and policy specific information collected, tabulated, checked, and edited by NCCI. Information is collected in sufficient detail such that workers compensation experience can be allocated to individual classifications, and therefore, to the five industry groups. WCSP data is the basis for allocating the statewide rate level change to the five industry groups as well as to all individual classifications. 11 This statement applies to industrial classifications, which comprise the bulk of the workers compensation classifications. This is not the case for Federal classifications (F-Classes). F-classes represent classifications where claims may be filed under the United States Longshoreman and Harbor Workers Act. This is a federal jurisdiction administered by Office of Workers Compensation Programs, United States Department of Labor. Workers injured on or near coastal or inland waterways have the option to file claims under either the Federal act or the Florida state act. Occupations include ship manufacturing and repair, stevedoring, etc. NCCI calculates rates for F- classes somewhat differently than for industrial classifications. Unlike industrial classifications, premium rates for F-classes are calculated directly from Workers Compensation Statistical Plan data % represents what are referred to as swing limits, the maximum allowable change (up or down, relative to the industry group change) in any year to the rate for a single classification. Swing limits are discussed later in this report. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 47 Step 4: Calculation of Rating Values The final step of the ratemaking process is the calculation of the required rating values for the experience rating program, retrospective rating programs 13, and other programs that individual insureds may voluntarily elect to subscribe to. General Approach to this Review The general approach to this review was as follows: 1. Identification of data and methodology used 2. Assessment of appropriateness of data and methodology used Is the methodology a commonly applied actuarial technique? Is it appropriate in the circumstances of its use by NCCI? Does it meet Actuarial Standards of Practice? Is data appropriate for methodologies employed? What additional methodologies were available? 3. Assessment of consistency of methodologies used What changes to methodology were made in the past, and why? Were any changes to methodology justified with clear and unbiased communication to all parties? What was the impact of the change in the methodology? 4. Is there evidence of bias in the ratemaking process? The review process was as follows: 1. Review initial documentation provided by NCCI. 2. Issue requests for additional information from NCCI. 3. Discuss questions and concerns with the Florida Office of Insurance Regulation Issue Draft Report to Florida Office of Insurance Regulation. 5. Consider comments from Florida Office of Insurance Regulation and NCCI. 6. Issue Final Report 13 Retrospective rating represents a type of insurance program where a specific employer s premium is based on actual loss experience under the program, subject to certain maximum and minimum premiums and limits on the cost of individual claims. Retrospective premiums are periodically recalculated for years after the actual insurance policy expired. The recalculation reflects the most recently available actual loss experience under the program. 14 Oliver Wyman s contact during the course of this review was Mr. James Watford, ACAS, Actuary, Florida Office of Insurance Regulation. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 58 This assignment was not used as a vehicle to substitute Oliver Wyman s professional opinions for those of NCCI. Oliver Wyman conducted an objective review and identified those areas where, in Oliver Wyman s opinion, NCCI s documentation was incomplete or where inappropriate actuarial judgments were made, or where additional investigation by NCCI into specific issues was warranted. Oliver Wyman s findings that specific processes, judgments, or assumptions are reasonable, or Oliver Wyman s lack of issue with the same, do not necessarily mean that Oliver Wyman endorses them or would take the same approach if Oliver Wyman were to conduct its own independent analysis of rate needs in the state of Florida. Oliver Wyman s report to the FLOIR consists of the text and charts in this document. A complete list of documents and data provided is attached at the end of this report. Applicable Considerations and Limitations are attached as well. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 69 2 Executive Summary Principal Conclusions 1. The NCCI ratemaking process (in Florida 15 ) is based on commonly applied actuarial methodologies that are supported in actuarial literature as well as by frequency of usage by credentialed actuaries. a. The NCCI ratemaking process draws from a group of actuarial methodologies employed by NCCI and other ratemaking organizations in other states. b. Actuarial methodologies used by NCCI are appropriate within the context of their use in the NCCI ratemaking process in Florida. c. Oliver Wyman considers the Standards of Practice established by the Casualty Actuarial Society as the governing body of documentation used to determine whether the NCCI ratemaking process in Florida is compliant with applicable actuarial standards of practice. Actuarial methodologies used by NCCI are consistent with: - The Statement of Principles Regarding Property and Casualty Insurance Ratemaking, as published by the Casualty Actuarial Society - The Statement of Principles Regarding Risk Classification, as published by the Casualty Actuarial Society - The Code of Professional Conduct, as published by the Casualty Actuarial Society Elements of the NCCI ratemaking methodology are included in the current Syllabus of Examinations, including publications authored by NCCI actuaries. Oliver Wyman reviewed the key elements and selected specific details of the NCCI ratemaking process. Oliver Wyman based its conclusion on this review. Oliver Wyman did not conduct an exhaustive examination of every method and calculation employed by NCCI. Some of these methods and calculations might potentially benefit from review or updating. Additionally, while Oliver Wyman tested the behavior of certain rating values over time for reasonableness, Oliver Wyman did not examine the detailed calculations of all of these elements during this review. These issues are not material as respects the conclusion above. 15 This report addresses NCCI ratemaking processes and methodologies in the state of Florida, only. Unless otherwise stated, any references to the NCCI ratemaking process or ratemaking methodologies are specific to the state of Florida. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 710 2. The NCCI ratemaking process is based on data that is appropriate as respects the actuarial methodologies used in the ratemaking process. a. The financial call data collected by NCCI is appropriate for the actuarial methodologies used by NCCI to calculate the statewide rate change. b. The WCSP data collected by NCCI is appropriate for the actuarial methodologies used by NCCI to distribute the statewide change to the five industry groups and the individual classifications in each industry group. The financial call data and WCSP data are the primary data sets used by NCCI in the ratemaking process. Each set of data has advantages and limitations. The ratemaking processes employed by the NCCI tend to maximize the advantages of each set of data, and tend to minimize the impact of limitations of each set of data. 3. The general NCCI ratemaking process is consistent over time. However, judgments and assumptions as respects specific decisions on methodology and the selection of actuarial parameters may vary between rate applications. a. The general ratemaking process employed by NCCI and the specific algorithms used in the NCCI rate application have generally been consistent over time, with the following notable exceptions. - In 2010, NCCI implemented a material change to the method by which NCCI distributes the statewide rate change to individual classifications. This change was made in most (if not all) states where NCCI provides advisory ratemaking and statistical services, and has been generally referred to as the changes to class ratemaking. Oliver Wyman has reviewed these changes in detail on behalf of regulators in other jurisdictions and opined that generally, these changes represented a material improvement over past practice. Of note is that one element of the change, a large reduction to the maximum value that a specific claim or occurrence could contribute to the experience of any single classification, was one of Oliver Wyman recommendations during a prior peer review project. Nevertheless, there are elements of concern regarding the new methodologies. The concerns do not relate to the method itself, which as noted earlier, is actuarially sound and a material improvement to the prior approach. Rather, the concerns relate to testing certain parts of the calculation to ensure that they reasonably reflect empirical data in Florida. Oliver Wyman discusses these concerns later in this report, and addresses them in the section on recommendations. - For rates and rating values effective January 1, 2012, NCCI changed a key element of the methodology used to determine the statewide rate indication. Specifically, the experience period used were changed from the most recent two calendar-accident years to the most recent two policy years. There are a number of concerns regarding the underlying reasons provided by NCCI to justify this change. In Oliver Wyman s opinion, documentation provided by OLIVER WYMAN ACTUARIAL CONSULTING PAGE 811 NCCI did not justify this change. Oliver Wyman discusses this concern later in this report, and addresses it in the section on recommendations. b. Certain specific judgments and assumptions vary between rate applications. In general, specific judgments and assumptions are a matter of professional actuarial opinion. There is a concern that relying on varying judgments and assumptions regarding key actuarial parameters (the most important of which is trend) rather than a consistent selection methodology over time increases the potential for generating rate level indications based on predetermined notions, rather than objective statistical measurements. Conversely, there are arguments that fixing all aspects of the ratemaking methodology may lead to illogical results when changes occur to the workers compensation system. This author, as respects statewide ratemaking, has generally recommended that methodologies and selection criteria for key actuarial parameters such as trend be fixed over time unless there is a compelling reason to change. Nevertheless, this is Oliver Wyman s professional opinion. Oliver Wyman finds nothing inherently improper with NCCI s general approach to ratemaking as respects this issue. Additionally, NCCI s trend selections for the most recent three rate applications (rates and rating values effective 1/1/12, 1/1/13, and 1/1/14) are reasonable. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 912 Recommendations 1. The change from a calendar/accident year based methodology to a policy year based methodology was not justified by support and documentation provided by NCCI. - The basis for the change to a policy year method was NCCI s assertion that the impact of audit premium corrections during the recessionary period (circa ) would amplify the imprecise match between calendar year earned premium and the accident year losses utilized in the calendar/accident year method, distorting the rate level calculation. Examination of specific metrics in documentation underlying the most recent three rate applications demonstrates that the impact of audit premium corrections could have been addressed through simple, temporary adjustments to calendar year earned premium within the calendar/accident year method, rather than changing to a policy year method. - The policy year methodology introduces the need for an actuarial parameter not required by the calendar/accident year methodology, called premium development factors. NCCI consistently underestimated these factors in applications for revised rates effective January 1, 2012 and January 1, 2013 (based on a comparison of forecasts made in the rate application and actual data available the following year). Additionally, the pattern of data behavior shows that NCCI likely underestimated these factors in the most recent rate application as well. The pattern of consistently underestimating a set of parameters creates a perception that this pattern is intentional. Note that this pattern acted to marginally increase rate level using the policy year based methodology. - The reason for the audit premium issue was the economic disruption during the recessionary period, which was temporary and short-term in the context of workers compensation ratemaking. Additionally, the nature of the economic disruption during this period was unique in that it was relatively sudden and large. - The impact of the audit premium issue affected primarily large deductible employers. The impact on smaller employers (standard policies) was less, based on data provided by NCCI. Standard experience receives the bulk of the weight in the rate level application. - At the time that the change to methodology was implemented (for rates effective January 1, 2012), NCCI had sufficient data (termed Early Warning Exhibits) from which to gauge the potential impact of the audit premium issue and adjust, if necessary, calendar/accident year data. This would have been the preferred approach rather than changing methodology. - Oliver Wyman notes that for the period of time under question, the policy year methodology produced an overall rate level indication less than the accident year methodology. This does not justify a change from a methodology that had been used successfully in Florida for decades. An argument that a change to methodology is supported because the specific result of the OLIVER WYMAN ACTUARIAL CONSULTING PAGE 1013 proposed method is more palatable to a specific party is precisely the type of bias that the ratemaking process must avoid. Given that: - the audit premium issue was temporary as to duration; - the impact of the audit premium issue, as measured by premium development factors, was relatively small; - the impact of the audit premium issue was larger for large deductible employers, which receive relatively low weight in the rate calculation; - the policy year based methodology increases the reliance on trend values and decreases reliance on actual loss data; - the policy year based methodology requires an additional actuarial parameter that must be forecast, premium development factors; and - NCCI has consistently underestimated premium development for the policy year based methodology in a manner that marginally increased the rate level indication generated by the policy year based methodology. Oliver Wyman recommends that the calendar/accident year based methodology be reinstated at a point in time when the difference between results using policy year data and calendar/accident year data is not material. Oliver Wyman s understanding is that concerns regarding the impact of audit premium on calendar/accident year experience periods were expressed in a prior actuarial peer review. 16 Oliver Wyman reviewed this report, and notes the following comment: Policy year premium is not subject to such distortion since the audit premium adjustments are recorded in the same year the policy was written. 17 This statement is incomplete. Policy year premium is free of distortion due to changes in audit premium only if the selection of premium development factors exactly anticipates the impact of audit premium. The prior peer review did not address the potential impact of changes to audit premium on policy year premium development. 16 American Actuarial Consulting Group, January 21, The complete passage is taken from page 17 of the report and is as follows: The NCCI currently relies on calendar-accident year data to estimate its overall rate change indication. Under this approach, the premium used is on a calendar year basis while the losses are on an accident year basis. The calendar year premium is subject to distortions caused by changes in audit premium adjustments since the adjustments recorded in a specific year are generally from policies which were written in the prior year. To the extent that the level of audit premium adjustments fluctuates from year to year, a distortion is introduced in the ratemaking formula. Policy year premium is not subject to such distortion since the audit premium adjustments are recorded in the same year the policy was written. Based on information provided by the NCCI, such distortion may be present in the calendar year premium for According to the NCCI, the economic downturn has caused the payroll in Florida to drop, resulting in lower audit premium adjustments which in turn results in lower calendar year earned premium. AACG believes that the varying levels of audit premium adjustments could cause the overall rate change indications to be distorted. AACG recommends that the NCCI monitor the difference in overall rate change indications between the calendaraccident year approach and the policy year approach in future rate filings. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 1114 2. NCCI should consider an actuarial methodology that quantitatively provides a trend selection based on observed empirical trends. Numerous approaches exist that provide reasonable results over time. Such approaches have been used by NCCI in the past. If such an approach were included in future rate applications, judgmental departures from that approach could be justified by NCCI if there were compelling reasons to do so. 3. Oliver Wyman recommends that NCCI continue to report to the FLOIR detailed information on off-balance. The selection of a target off-balance is as much a policy issue as an actuarial issue. NCCI selects a target off-balance in Florida equal to From an actuarial perspective, literature suggests that theoretically, a target off-balance closer to is more appropriate. A target off-balance of 0.99 would have the impact of increasing the average experience modification in Florida from to 0.990, and result in a manual rate decrease of approximately 3.1%, all else being equal. However, there are potential ramifications of such a change on employers with experience modifications close to, but less than, These employers potentially could see experience modifications increase to slightly above Additionally, NCCI s assertions (based on discussions with NCCI regarding off-balance in other jurisdictions) that loss ratio results for smaller employers tend to be the highest and that raising the target off-balance would reduce premium collections from these employers is a legitimate concern. 4. Oliver Wyman s primary concern with the revised class ratemaking methodology implemented in 2010 is the substitution of theoretical excess loss ratios for actual data to provide for losses excess the $500,000 per claim limit. In the past, excess loss ratios and hazard grouping were parameters affecting primarily retrospectively rated and large deductible policies. Oliver Wyman s specific concerns are as follows: - Are hazard groupings designed for retrospective rating appropriate for class ratemaking and supported by empirical data? - Are the excess loss ratios by hazard group supported by empirical data? - Are the occurrence of extraordinarily large claims (for example, claims in excess of $2 million) predictable by hazard group, or should excess cost of these claims be socialized across all classifications? Florida is a very large state with a substantial volume of credible loss experience. Oliver Wyman recommends that the FLOIR request NCCI to provide a detailed robust analysis of empirical experience in Florida that addresses the questions posed above. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 1215 3 Discussion Statewide Rate Indication Introduction Contributing elements to the statewide rate change include Loss Experience Benefit Changes Trend Loss Adjustment Expense Other Insurance Company Expenses Taxes and Assessments Profit and Contingencies Each is discussed individually. Loss Experience The analysis of loss experience generates a forecast of the final expected cost of claims with dates of loss during the specified experience periods. Key considerations in this process are the selection of experience periods, database, and methods used to forecast the expected cost of claims. Experience Period There are generally two types of experience periods available for analysis, policy year and calendar/accident year. Each experience period has two key components: losses and premium. The definition of each component varies with the experience period under consideration. Each component, as well as other information specific to each experience period, is provided below: Policy Year Experience Losses: Loss experience mapped to a specific policy year is due to claims covered by policies written during that year. Policy year periods in NCCI applications are calendar years. Therefore, claims covered by policies written during 2011 generate losses associated with policy year 2011 (PY2011). Losses OLIVER WYMAN ACTUARIAL CONSULTING PAGE 1316 must be developed, or adjusted, to a final cost basis. Loss development adjustments are required because the final cost of the group of claims associated with a specific policy year will not be known until after all claims are reported, paid, and closed. This will not occur until 50 or more years after the end of the policy year. 18 Loss development is a standard part of all NCCI applications and is discussed later in this section. Premium: Premium mapped to a specific policy year is premium associated with policies written during the specified policy year period. Therefore, premium associated with PY2011 is the total premium associated with policies written during Policy year premium must be developed, or adjusted, to reflect the anticipated impact of premium adjustments over time. Premium adjustments are primarily due to the anticipated impact of premium audits, which generally occur within 12 months after a typical policy has expired. 19 Therefore, policy year premium used to determine the experience indication is an estimate equal to premium reported to NCCI by the insurance carriers multiplied by a premium development factor. 20 Premium to Loss Experience Matching: Policy year experience maximizes the matching of losses to the premium insuring those losses. For PY2011, for example, a common group of insurance policies generates the loss experience and premium reported to NCCI. Maturity of Experience: Policy year experience extends over a 24 month period because only policies written on January 1 will have claims with dates of loss exclusively in the year of writing. Using PY2011 as an example, a policy written 18 Loss development is a standard actuarial approach and is required for the analysis of numerous types of casualty exposures besides workers compensation, such as general liability, medical professional liability, automobile liability, etc. However, loss development for workers compensation claims generally has the longest durations of all casualty exposures given that permanent total disability income benefits, the most expensive but least frequent of workers compensation claims, are payable to age 75 in Florida. In other states, benefits are for the lifetime of the claimant. 19 Audits are typically within six months after policy expiration. An audit generally is a reassessment of payroll to determine actual payroll during the policy period. Insurers use estimated payroll to determine the initial premium payment prior to policy inception. Premium is recalculated using actual payroll. The difference between premium based on audited payroll and premium based on estimated payroll is the reason why policy year premium changes over time. NCCI uses premium development factors to incorporate the estimate of audit adjustments on policy year premium reported to NCCI by insurance carriers (see the following footnote). 20 As noted in the preceding footnote, the auditing process requires a recalculation of policy year premium using audited (actual) payroll, causing policy year premium to change from amounts initially reported to NCCI by the insurance carriers. Premium development factors reflect the impact of the auditing process and measure the change to reported policy year premium over time. In a simple example, NCCI multiplies reported policy year 2011 deductible premium by a premium development factor of to reflect the expected impact of future audit adjustments. The value of is based on historical premium development data presented in Appendix A-II of the application for revised rates and rating values effective January 1, OLIVER WYMAN ACTUARIAL CONSULTING PAGE 1417 on January 1, 2011 will provide coverage for claims with dates of loss from January 1, 2011 through December 31, On the other hand, a policy written on December 31, 2011 will provide coverage for claims with dates of loss from December 31, 2011 through December 30, Therefore, approximately half the claims associated with PY2011 will have dates of loss in The other half will have dates of loss in The average date of loss is approximately December 31, Policy Year Data Available for the January 1, 2014 Application: The two most recent policy years available for use in the most recent rate application are PY2010 and PY2011. Therefore, the average date of loss of claims data associated with a policy year approach would be June 30, This benchmark is important for a comparison with the calendar/accident year approach. Calendar/Accident Year Experience Losses: Loss experience mapped to a specific accident year is due to claims with dates of loss in a specific calendar year. Therefore, claims associated with accident year 2012 (AY2012) have dates of loss in Losses must be developed, or adjusted, to a final cost basis, as is the case with policy year experience. Premium: Premium mapped to a specific accident year is calendar year earned premium. 23 This basis of calendar/accident year assumes that premium earned during a specific period provides for the cost of insuring claims with dates of loss during that same period. However, the initial calculation of earned premium is not adjusted for the impact of premium audits on underlying policies. Rather, premium adjustments due to audit are considered earned in the year the premium adjustments are made, rather than recalculating premium earned by the underlying policies with the audit adjustments. Therefore, once calculated, 21 This would be the case if policies are written and incepted evenly over the year, and if claims occur evenly over the policy periods. As these are usually not the case, the average date of loss is generally close to, but not exactly equal to, December The average date of loss of claims associated with PY2010 is December 31, The average date of loss of claims associated with PY2011 is December 31, The average of these two dates is June 30, Earned premium during a specific calendar year for an individual policy is equal to the total written premium for that policy multiplied by a ratio representing the portion of the policy term in the specific calendar year relative to the total policy term. An example is a policy written on October 1, 2011 for $100,000. $25,000 (25%) of the premium was earned in 2011, and $75,000 was earned in In the simplest sense, total calendar year 2011 earned premium that could be used in the rate application is an extension of this calculation for all policies that had any portion of their policy term in OLIVER WYMAN ACTUARIAL CONSULTING PAGE 1518 calendar year earned premium is fixed, prior to consideration of data quality edits that may be made by NCCI at future dates. This leads to an imprecise match between earned premium and underlying loss data in calendar/accident year experience. Premium to Loss Experience Matching: The imprecision in the match between earned premium and underlying loss data in calendar/accident year experience is relatively minor if the impact of audit adjustments is relatively constant over time. In this case, the impact on measured loss ratios is immaterial. Maturity of Experience: Calendar/accident year experience extends over a 12 month period because calendar year earned premium is matched to losses generated by claims with dates of loss in the specified calendar year. Using calendar/accident year 2011 (AY2011) as an example, the average date of loss is approximately June 30, Calendar/Accident Year Data Available for the January 1, 2014 Application: The two most recent calendar/accident years available for use in the most recent rate application are AY2011 and AY2012. Therefore, the average date of loss of claims data associated with a calendar/accident year approach would be December 31, Therefore, calendar/accident year data is roughly 6 months more recent that available policy year data. Comparison and Discussion There are advantages and disadvantages to the use of either experience period. Calendar/Accident year experience represents the most recent experience available for analysis and is therefore a better indicator of current conditions. 26 Equally important, calendar/accident year experience reduces the reliance on trend by approximately six months. This latter issue is important in situations such as Florida 24 This is the case if premium is earned and if claims occur evenly over the calendar year. As this is usually not the case, the average date of loss is generally close but not exactly equal to, June The average dates of loss of claims associated with AY2011 and AY2012 are June 30, 2011, and June 30, The average of these two dates is December 31, From a statistical viewpoint, arguments have been made that the advantage of using the more recent calendar/accident year data is somewhat offset by greater volatility because this data is six months less mature than policy year data. Oliver Wyman s experience has been that this is not an issue when examining potential variability of the indicated statewide change due to experience, trend, and benefits. The averaging process used to select loss development factors as well as the inherent variation of underlying loss experience tends to overwhelm any additional variability due to loss experience that is six months more recent and therefore six months less mature. Additionally, consistent use of a specific methodology over time, as had been done in Florida for decades (before NCCI precipitated a change to policy year experience) will eliminate the impact of statistical fluctuation, no matter how small. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 1619 where trend is a selected value, rather than a calculated value using a standard methodology. A disadvantage of calendar/accident year experience is the concern regarding the imprecise match of premium to losses. This is ususally not a material issue if the impact of audit adjustments is relatively constant over time. 27 Another mitigating factor is the requirement of premium development factors for policy year data. To the extent that policy year premium develops at rates greater than or less than anticipated by premium development factors, policy year premium data will essentially be mismatched as well. This would be because the anticipated impact of audit adjustments embedded in the premium development factors will have been misestimated. Calendar/accident year experience had been the basis for rate applications in Florida since the early 1990s. 28 For rates and rating values effective January 1, 2012, NCCI changed the experience period and utilized the most recent two policy years. The underlying argument for the basis of this change was unexpectedly large and negative audit adjustments embedded in the calendar/accident year experience that was available for that application, AY2009 and AY2010. Oliver Wyman s opinion is that this change to methodology was not warranted because the unexpectedly negative audit adjustments that NCCI asserts was not contemplated by calendar/accident year data also distorted policy year data through selected policy year premium development factors that were either too low, or possibly too high, depending on the rate application. Of note is that the audit adjustments appear to have had the largest impact on large deductible policies only. This is illustrated by the following policy year premium development history tabulated from recent NCCI applications in Florida: 27 NCCI states the same in its response dated August 21, 2013, to questions posed by Mr. James Watford: A given calendar year would include the audit premiums from the previous year s exposure, roughly offsetting the missing audit premiums for the current year s exposures (which would be included in the subsequent calendar year). However, when audit premiums change significantly from one year to the next, the mismatch of premiums and losses can result in a distortion to the calendar-accident year results. 28 This statement is based on documentation reviewed by Oliver Wyman in the proceedings for rates effective January 1, 2014 and rates effective January Oliver Wyman did not check the methodology used in every application going back to the 1990s. OLIVER WYMAN ACTUARIAL CONSULTING PAGE 1720 Standard Coverage Premium Development by Policy Year 1 to 2 2 to 3 3 to 4 4 to 5 PY PY PY PY PY PY PY to 2 refers development from the first report of policy year data to the second. For example, for PY2010, means reported policy year 2010 premium increased by 0.2% from 12/31/11 (the first report of PY2010 premium data) to 12/31/12 (the second report of PY2010 data). It is obvious that for standard coverage, the impact of adjustments over time on premium has been relatively consistent and minimal. Additionally, it is clear that for PY2008, there was a small change to premium development. The implication is that the impact of audits on calendar/accident year premium for standard coverage has been minimal as well. Large Deductible Coverage Premium Development by Policy Year 1 to 2 2 to 3 3 to 4 4 to 5 PY PY PY PY PY PY PY Clearly there was a material shift in premium development within the first to second development period for large deductible policies. Note that the distortion to premium development is greatest for PY2008, the same as for standard policies. Policy year based methods require a forecast of premium development. NCCI has consistently underestimated premium development. This is illustrated in the following tables: STANDARD COVERAGE Selected Actual Application for First Report 1 to 2 Premium 1 to 2 Premium Rates Effective Policy Year Development Development January 1, January 1, January 1, ? OLIVER WYMAN ACTUARIAL CONSULTING PAGE 18 View more
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