When calculating the impact of policy, does the CBO/BLS/DHH or other government agency consider the number of future people who will be affected over the lifetime of the policy?
For example population growth in 2008 was estimated to be about 2.7 million. By census estimates, this growth is composed of 4.248 million births less 2.473 million deaths. With a natural growth of 1.7 million, this leaves about 1 million additional people who came by immigration or due to census estimation error. So population grew 2.7 million in 2008, but the actual number of new people affected by a policy enacted in 2008 is closer to 5.2 million (new births/immigrants).