Book excerpt: Despite the continuing inter-government cooperation over the regulation of international commerce, significant cross-country differences persist in areas such as merger control, notification to authorities, and remedies deemed appropriate for antitrust enforcement. Accordingly, companies must be aware of the rules that apply in the countries in which they do business. This fourth edition of the Kintner-Joelson classic International Antitrust Primerprovides a thorough update of the status of competition regulation in a number of key jurisdictions, including up-to-date case law involving the technology giants Google, Microsoft, Amazon, Apple, and Facebook. Coverage focuses on the European Union and the United States — which continue to be foremost in the enforcement and refinement of comprehensive competition laws — but also takes into account the vast strides that are being made elsewhere, with chapters on South Korea, Japan, and India, as well as a chapter on the United Kingdom with a section on the post-Brexit implications. The book provides essential guidance on such issues of concern to business persons and their counsel as the following: • intellectual property rights; • extent and kind of criminal sanctions; • extraterritorial reach; • mergers and acquisitions; • level and type of enforcement activity; • effects of national foreign or domestic policy; • permissible cooperation among competitors; and • public procurement. Business persons, government officials, students, lawyers, and others who have been relying on this preeminent resource for years will greatly appreciate this thoroughly updated edition. There is nothing else that so lucidly and helpfully explains competition law for those who require a working knowledge of the subject to proceed confidently in their day-to-day work.