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  • 2005 Living to 100 and Beyond Monograph: An Investigation of Select Birth Cohorts

    2005 Living to 100 and Beyond Monograph: An Investigation of Select Birth Cohorts Paper examines the existence of select birth cohorts of unusually high longevity improvement, their geographic ...

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    • Authors: Krzysztof Ostaszewski, Richard MacMinn, Ranee Thiagarajah, Frederik Weber
    • Date: Jan 2005
    • Competency: External Forces & Industry Knowledge
    • Topics: Demography
  • Revisiting Pension Actuarial Science: A Five-Part Series – Author Comments

    Revisiting Pension Actuarial Science: A Five-Part Series – Author Comments Authors’ response to comments by Ryan Labs Asset Management on paper by James J. Rizzo Krzysztof M. Ostaszewski Piotr ...

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    • Authors: James Rizzo, Krzysztof Ostaszewski, Piotr Krekora
    • Date: Jun 2010
    • Competency: Technical Skills & Analytical Problem Solving>Process and technique refinement
    • Topics: Pensions & Retirement>Assumptions and methods; Pensions & Retirement>Public sector plans; Pensions & Retirement>Risk management
  • Revisiting Pension Actuarial Science: A Five-Part Series – Discussant Comments

    Revisiting Pension Actuarial Science: A Five-Part Series – Discussant Comments Comments by Ryan Labs Asset Management on paper by James J. Rizzo Krzysztof M. Ostaszewski Piotr Krekora. Discount ...

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    • Authors: James Rizzo, Krzysztof Ostaszewski, Piotr Krekora
    • Date: Jun 2010
    • Competency: Technical Skills & Analytical Problem Solving>Process and technique refinement
    • Topics: Pensions & Retirement>Assumptions and methods; Pensions & Retirement>Public sector plans; Pensions & Retirement>Risk management
  • Using Statistical Analysis and Actuarial Judgment in the Calculation of Medical Liability

    Using Statistical Analysis and Actuarial Judgment in the Calculation of Medical Liability This paper discusses the need for actuarial judgment to be used in conjunction with statistical analysis ...

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    • Authors: Jed Linfield, Krzysztof Ostaszewski, Jinadasa Gamage
    • Date: Jan 2007
    • Competency: Technical Skills & Analytical Problem Solving>Innovative solutions; Technical Skills & Analytical Problem Solving>Problem analysis and definition
    • Topics: Actuarial Profession>Best practices; Health & Disability>Health insurance
  • An Investigation of Select Birth Cohorts

    An Investigation of Select Birth Cohorts The abstract for the paper An Investigation of Select Birth Cohorts. Life expectancy;Longevity; 8538 1/1/2005 12:00:00 AM ...

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    • Authors: Krzysztof Ostaszewski, Richard MacMinn, Ranee Thiagarajah, Frederik Weber
    • Date: Jan 2005
    • Competency: External Forces & Industry Knowledge
    • Topics: Demography>Longevity
  • The Economic Aspects of Life Insurance Backdating

    The Economic Aspects of Life Insurance Backdating Discusses the reasons for, and the economic impacts of, the backdating of life insurance policies, and what changes in the industry might evolve ...

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    • Authors: Krzysztof Ostaszewski, James M Carson, Christopher E Clark
    • Date: Jan 2005
    • Competency: External Forces & Industry Knowledge>Actuarial methods in business operations
    • Topics: Life Insurance>Pricing - Life Insurance
  • Revisiting Pension Actuarial Science: A Five-Part Series – Part 3, Fair Value of the Liability – A Market-Based Discount Rate

    Revisiting Pension Actuarial Science: A Five-Part Series – Part 3, Fair Value of the Liability – A Market-Based Discount Rate Part 3 proposes solutions to the third of three flaws of the current ...

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    • Authors: James Rizzo, Krzysztof Ostaszewski, Piotr Krekora
    • Date: Jun 2010
    • Competency: Technical Skills & Analytical Problem Solving
    • Topics: Pensions & Retirement>Assumptions and methods; Pensions & Retirement>Public sector plans; Pensions & Retirement>Risk management
  • Statistical Tools–Regression Method–Workbook

    Statistical Tools–Regression Method–Workbook Recognizing an opportunity to help serve its members in this age of increased financial oversight, the Health Section of the Society of Actuaries ...

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    • Authors: Steven Siegel, Jed Linfield, Krzysztof Ostaszewski, Jinadasa Gamage
    • Date: Oct 2007
    • Competency: Technical Skills & Analytical Problem Solving
    • Topics: Modeling & Statistical Methods>Estimation methods
  • Revisiting Pension Actuarial Science: A Five-Part Series – Part 2, Fair Value of the Liability – Risk-Adjusted CBO Cash Flows

    Revisiting Pension Actuarial Science: A Five-Part Series – Part 2, Fair Value of the Liability – Risk-Adjusted CBO Cash Flows Part 2 proposes solutions to the second of three flaws of the ...

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    • Authors: James Rizzo, Krzysztof Ostaszewski, Piotr Krekora
    • Date: Jun 2010
    • Competency: Technical Skills & Analytical Problem Solving>Process and technique refinement
    • Topics: Pensions & Retirement>Assumptions and methods; Pensions & Retirement>Public sector plans; Pensions & Retirement>Risk management
  • Providing Great Opportunities: An Actuarial Day for Illinois High School Students

    On April 22, 2025, the Society of Actuaries (SOA) and the Illinois State University (ISU) Actuarial Program held an Actuarial Day for high school and college students on the ISU campus. It was ...

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    • Authors: Marta Jimenez-Lutter, Krzysztof Ostaszewski
    • Date: Aug 2025
    • Competency: Leadership
    • Publication Name: Expanding Horizons
    • Topics: Actuarial Profession; Actuarial Profession>Academic partnerships; Actuarial Profession>Mentoring; Actuarial Profession>Qualifications