Any State with an agreement under this subsection shall evaluate the comparative cost and employment effects of the use of the definition of unemployment in its demonstration project under this section by use of experimental and control groups comprised of a random sample of individuals receiving aid under section 607 of this title and shall furnish the Secretary with such information as the Secretary determines to be necessary to evaluate the results of the project conducted by the State.

The Secretary shall report the results of the demonstration projects conducted under this subsection to the Congress not later than 6 months after all such projects are completed.