The Brussels effect is the process of unilateral regulatory globalisation caused by the European Union de facto (but not necessarily de jure) externalising its laws outside its borders through market mechanisms.
The combination of market size, market importance, relatively stringent standards and regulatory capacity of the European Union can have the effect that firms trading internationally find that it is not economically, legally or technically practical to maintain lower standards in non-EU markets. Non-EU companies exporting globally can find that it is beneficial to adopt standards set in Brussels uniformly throughout their business. 
The California effect and the Brussels effect are a form of ‘race to the top’ where the most stringent standard has an appeal to companies operating across multiple regulatory environments as it makes global production and exports easier. The effects are the opposite of the Delaware effect, a race to the bottom where jurisdictions can purposely choose to lower its regulatory requirements in an attempt to attract businesses looking for the least stringent standard. 
The October 2000 $42 billion proposed acquisition of US-based Honeywell International by US-based General Electric was blocked by the EU antitrust authorities on the grounds of risking a horizontal monopoly in jet engines. The merger could not proceed because, despite the American Department of Justice having already approved the merger between these two US based entities, it was not legally possible to let the acquisition proceed in one important market, but not in another. 
US-based multinational Dow Chemical announced in 2006 it would comply with the EU's Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) regulation for the production and use of chemical substances across its global operation.
In 2012 the EU included aviation into its existing Emission Trading Scheme. This means that any airline, regardless of their country of origin, has to purchase emissions permits for any flights within the European Economic Area.  The cost of complying with EU aviation emission regulation puts pressure on manufacturers to design airplanes with improved efficiency and reduced emissions. As major airlines would not likely purchase airplanes specifically to fly outside the EEA, the EU’s stricter aviation standards have an impact on global airplane fleets, regardless of the jurisdiction of the airline.
Data protection and privacy
With the introduction of the Data Protection Directive in 1995 the EU had opted for a strict top-down approach to data privacy.  Its successor, the EU's General Data Protection Regulation (GDPR), was adopted on 14 April 2016 and had a global effect . In 2017, during negotiations for a new Japan-EU trade deal, Japan set up an independent agency to handle privacy complaints to conform with the EU's new privacy regulation. Facebook announced in April 2018 that it would implement parts of the GDPR globally, Sonos announced in April 2018 that it would implement the GDPR globally and Microsoft announced in May 2018 that it would implement GDPR compliance for all its customers globally.
- Bradford, Anu (2012) The Brussels Effect. Northwestern University Law Review, Vol. 107, No. 1, 2012; Columbia Law and Economics Working Paper No. 533. SSRN: https://ssrn.com/abstract=2770634
- Bach, David and Newman, Abraham (2007) – The European regulatory state and global public policy: micro-institutions, macro-influence – Journal of European Public Policy https://doi.org/10.1080/13501760701497659
- The Brussels Effect: The Rise of a Regulatory Superstate in Europe. Columbia Law School http://www.law.columbia.edu/media_inquiries/news_events/2013/january2013/brussels-effect
- Wall Street Journal – Hot U.S. Import: European Regulations May 2018 https://www.wsj.com/articles/techs-pickup-of-new-data-privacy-rules-reflects-eus-growing-influence-1525685400
- Lecture, March 2012 - "The Brussels Effect: The Rise of a Regulatory Superstate in Europe" https://www.youtube.com/watch?v=QeFmR3Fkjzw
- Vogel, David (1995). Trading Up: Consumer and Environmental regulation in a global economy. Harvard University Press. ISBN 9780674900837.
- Financial Times – Why the ‘Brussels effect’ will undermine Brexit regulatory push July 2017 https://www.ft.com/content/fd5ca278-6654-11e7-8526-7b38dcaef614
- Financial Times – Why the whole world feels the ‘Brussels effect’ November 2017 https://www.ft.com/content/7059dbf8-a82a-11e7-ab66-21cc87a2edde
- Yale Insights – Three Questions: Prof. David Bach on the Reach of European Privacy Regulations https://insights.som.yale.edu/insights/three-questions-prof-david-bach-on-the-reach-of-european-privacy-regulations
- Robert E. Wright (8 June 2012). "How Delaware Became the King of U.S. Corporate Charters". Bloomberg View. Retrieved 18 May 2018.
- European Commission – Case No COMP/M.2220 - General Electric/Honeywell http://ec.europa.eu/competition/elojade/isef/case_details.cfm?proc_code=2_M_2220
- Dow and REACH - Protecting human health and the environment https://reach.dow.com
- Reach External FAQs https://consumer.dow.com/en-us/technical-support/ehs-portal/reach-external-faqs.html
- European Commission – Reducing emissions from aviation https://ec.europa.eu/clima/policies/transport/aviation_en
- Gady, Franz-Stefan (2014) EU/U.S. Approaches to Data Privacy and the "Brussels Effect": A Comparative Analysis https://www.jstor.org/stable/43773645
- Financial Times – Information wars: How Europe became the world’s data police May 2018 https://www.ft.com/content/1aa9b0fa-5786-11e8-bdb7-f6677d2e1ce8
- International Centre for Trade and Sustainable Development – Europe’s Data Privacy Rules Set New Global Approach to Consumer Rights May 2018 https://www.ictsd.org/bridges-news/bridges/news/europe%e2%80%99s-data-privacy-rules-set-new-global-approach-to-consumer-rights
- Politico.EU – Europe’s new data protection rules export privacy standards worldwide January 2018 https://www.politico.eu/article/europe-data-protection-privacy-standards-gdpr-general-protection-data-regulation/
- Facebook's commitment to data protection and privacy in compliance with the GDPR https://www.facebook.com/business/news/facebooks-commitment-to-data-protection-and-privacy-in-compliance-with-the-gdpr
- Complying With New Privacy Laws and Offering New Privacy Protections to Everyone, No Matter Where You Live https://newsroom.fb.com/news/2018/04/new-privacy-protections/
- We’re Updating the Sonos Privacy Statement https://blog.sonos.com/en-gb/updating-sonos-privacy-statement/
- Microsoft’s commitment to GDPR, privacy and putting customers in control of their own data https://blogs.microsoft.com/on-the-issues/2018/05/21/microsofts-commitment-to-gdpr-privacy-and-putting-customers-in-control-of-their-own-data/