Enhancing consumer welfare is at the heart of competition law.
Of the many facets that can be considered as consumer welfare,
changes in price and output are the easiest to measure and have,
therefore, traditionally been the de facto benchmark for assessing
anticompetitiveness. There are two current trends disrupting this:
first, a debate as to whether other elements of consumer welfare
should play a greater role, particularly treatment of
customers’ data; and second, the importance of big data in
maintaining competitive markets. These trends are reflected in the
growing regulatory scrutiny of big tech firms, the focus of
antitrust regulators on the digital economy and, in the European
Union in particular, the May 2018 implementation of the General
Data Protection Regulation (GDPR). This chapter provides an
overview of the current activities of the EU and US regulators in
cases at the intersection of competition law and data issues. Many
of the developments can be seen