In many policy areas it is essential to use the best estimates of life expectancy, but it is vital to most areas of pension policy. This paper presents the conceptual differences between static period and dynamic cohort mortality tables, estimates the differences in life expectancy for Portugal and Spain, and compares official estimates of both life expectancy estimates for Australia, the United Kingdom, and the United States for 1981, 2010, and 2060. These comparisons reveal major differences between period and cohort life expectancy in and between countries and across years. The implications of using wrong estimates for pension policy, including financial sustainability, are explored.

在许多政策领域中，必须使用最佳的预期寿命估计，但对于养老金政策的大多数领域而言，这一点至关重要。本文介绍了静态和动态队列死亡率表之间的概念差异，估算了葡萄牙和西班牙的预期寿命差异，并比较了1981、2010年澳大利亚，英国和美国的官方预期寿命估算值，以及2060年。这些比较揭示了国家/地区之间以及不同年份之间的预期寿命和同类预期寿命之间的主要差异。探索了对养老金政策使用错误的估计，包括财务可持续性的含义。