The mutual recognition of national regulations. 88% (38 votes) EU laws harmonising regulation in Europe. 12% (5 votes) Total votes: 43 Presentation videos: Embedded video for What has been more important for the success of the European Single Market?Embedded video for What has been more important for the success of the European Single Market?Embedded video for What has been more important for the success of the European Single Market?Link: https://en.wikipedia.org/wiki/Race_to_the_bottomhttps://en.wikipedia.org/wiki/California_effect