(134)The Commission should review the effects on the internal market resulting from the application of the thresholds and report thereon to the European Parliament and the Council. In so doing, it should take into account factors such as the level of cross-border procurement, SME participation, transaction costs and the cost-benefit trade-off. In accordance with Article XXII(7) thereof, the GPA shall be the subject of further negotiations three years after its entry into force and periodically thereafter. In that context, the appropriateness of the level of thresholds should be examined, bearing in mind the impact of inflation in view of a long period without changes of the thresholds in the GPA; in the event that the level of thresholds should change as a consequence, the Commission should, where appropriate, adopt a proposal for a legal act amending the thresholds set out in this Directive.