Bakr Ansari at the conference on regulation in the era of platforms: Nowhere in the world is there a regulator for all areas/ Four main models of regulation of services in the world Bakr Ansari, a faculty member of Shahid Bahshti University, said in the "Regulation in the Digital Economy" panel of the conference "Regulation in the Age of Platforms": Nowhere in the world is there a regulator for all digital areas. Ansari further explained the four models of regulation of the services sector in the world.