<p>The 'Green Book' and the recent EGRUP report support exchequer cost per job as a key input in the ex-ante appraisal of individual applications for Regional Selective Assistance (RSA) and the ex-post evaluation of the RSA scheme as a whole. In this paper, following a recommendation in the House of Commons Trade and Industry Committee's report on regional policy, the merits of an alternative, explicitly cost-benefit, framework are outlined. This approach incorporates the administration and compliance costs of the subsidy, costs at present ignored in RSA evaluation studies. An optimal ex-ante appraisal rule is developed. This takes the form of a cost-per-job ceiling, and a representative value is calculated for this figure. </p>