38 U.S.C. § 527

(a) The Secretary, pursuant to general standards which the Secretary shall prescribe in regulations, shall measure and evaluate on a continuing basis the effect of all programs authorized under this title, in order to determine their effectiveness in achieving stated goals in general, and in achieving such goals in relation to their cost, their effect on related programs, and their structure and mechanisms for delivery of services. Such information as the Secretary may consider necessary for purposes of such evaluations shall be made available to the Secretary, upon request, by all departments, agencies, and instrumentalities of the executive branch. (b) In carrying out this section, the Secretary shall collect, collate, and analyze on a continuing basis full statistical data regarding participation (including the duration thereof), provision of services, categories of beneficiaries, planning and construction of facilities, acquisition of real property, proposed excessing of land, accretion and attrition of personnel, and categorized expenditures attributable thereto, under all programs carried out under this title. (c) The Secretary shall make available to the public, and on a regular basis provide to the appropriate committees of the Congress, copies of all completed evaluative research studies and summaries of evaluations of program impact and effectiveness carried out, and tabulations and analyses of all data collected, under this section.