science

Mark Armstrong (economist)

Mark Armstrong (economist) is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Mark Armstrong (economist) rather than just read about it. In short: Mark Armstrong (born December 1964) is a British economist and professor of economics at University College London (UCL). He is known for his research in industrial organisation, focusing on oligopoly theory, consumer search and information frictions, and pricing decisions by platforms and other multi-product firms.

Key takeaways

Mark Armstrong (economist) belongs to science; place it in that map before memorising details.
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Connect Mark Armstrong (economist) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Mark Armstrong (economist) from memory before moving on to harder problems.

Reference excerpt

Mark Armstrong (born December 1964) is a British economist and professor of economics at University College London (UCL). He is known for his research in industrial organisation, focusing on oligopoly theory, consumer search and information frictions, and pricing decisions by platforms and other multi-product firms.

Education Armstrong earned a B.A. in mathematics from Queens' College, Cambridge in 1987. He then studied economics at St John's College, Oxford, where he received an M.Phil. and D.Phil. in 1992 under the supervision of James Mirrlees.

Career Armstrong's first academic position was as an assistant lecturer in microeconomics at the University of Cambridge, where he was also a fellow of Gonville and Caius College, Cambridge between 1992 and 1994. From 1994 to 1997, he held the Eric Roll Professorship of Economic Policy at the University of Southampton. In 1997, he returned to Oxford as an Official Fellow in economics at Nuffield College, Oxford. In 2003, Armstrong was appointed professor of economics at University College London. He remained in this position until 2011, when he became Statutory Professor of Economics and a fellow of All Souls College, Oxford, a role he held until 2022. He returned to University College London in July 2022 to take up his current position as professor of economics.

Research Armstrong’s research is primarily in industrial organisation, focusing on how firms and consumers behave in imperfectly competitive markets. His work has examined topics such as oligopoly theory, consumer search and information frictions, price discrimination, and pricing by multi-product firms and digital platforms. He has made pioneering contributions to the analysis of platforms and two-sided markets, showing how platforms set prices and balance participation on both sides of a market. His research on consumer search has explored how limited information and search costs shape competition, product quality, and pricing outcomes. With long-term collaborator John Vickers, Armstrong has studied topics including regulation, access pricing, price discrimination and bundling, consumer search, and multiproduct pricing.

Professional service Armstrong has held numerous professional and editorial positions during his career. He has served on the councils and executive committees of the European Economic Association (2010–2015), the Royal Economic Society (2010–2015), and the Econometric Society (2016–2019). He is also the President-elect of the European Association for Research in Industrial Economics (EARIE). He served as associate editor (1995–2002) and co-editor (2005–2020) of the RAND Journal of Economics, and held editorial roles at the Review of Economic Studies, including managing editor (1999–2003) and chair (2003–2010).

Honors Elected Fellow of the British Academy (2007) Elected Fellow of the Econometric Society (2008) Fellow of the European Economic Association

Selected works

Books Armstrong, Mark; Cowan, Simon; Vickers, John (1994). Regulatory Reform: Economic Analysis and British Experience. ISBN 978-0262510790. Armstrong, Mark; Porter, Robert (2007). Handbook of Industrial Organization, Volume III. ISBN 978-0444824356.

Publications Armstrong, Mark (1996). "Multiproduct Nonlinear Pricing". Econometrica. 64 (1): 51–75. doi:10.2307/2171924. ISSN 0012-9682. Armstrong, Mark (1998). "Network Interconnection in Telecommunications". The Economic Journal. 108 (448): 545–564. doi:10.1111/1468-0297.00304. Armstrong, Mark (2006). "Competition in two-sided markets". The RAND Journal of Economics. 37 (3): 668–691. doi:10.1111/j.1756-2171.2006.tb00037.x. Armstrong, Mark; Vickers, John; Zhou, Jidong (2009). "Prominence and Consumer Search". The RAND Journal of Economics. 40 (2): 209–233. ISSN 0741-6261. Armstrong, Mark; Vickers, John (2018). "Multiproduct Pricing Made Simple". Journal of Political Economy. 126 (4): 1444–1471. doi:10.1086/697902. Armstrong, Mark; Vickers, John (2019). "Discriminating against Captive Customers". American Economic Review: Insights. 1 (3): 257–272. doi:10.1257/aeri.20180581. Armstrong, Mark; Vickers, John (2022). "Patterns of Competitive Interaction". Econometrica. 90 (1): 153–191. doi:10.3982/ECTA18288. Armstrong, Mark; Zhou, Jidong (2022). "Consumer Information and the Limits to Competition". American Economic Review. 112 (2): 534–577. doi:10.1257/aer.20201137. Armstrong, Mark; Vickers, John (2023). "Multiproduct Cost Passthrough: Edgeworth's Paradox Revisited". Journal of Political Economy. 131 (10): 2645–2665. doi:10.1086/724948.

References

External links Official website

Illustrations

Worked examples

Example 1 — a first encounter with Mark Armstrong (economist)

Start with the simplest possible case. Write down what Mark Armstrong (economist) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Mark Armstrong (economist) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Mark Armstrong (economist) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Mark Armstrong (economist)

In research: Mark Armstrong (economist) appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Mark Armstrong (economist) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Mark Armstrong (economist) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1964 births, Alumni of Queens' College, Cambridge, Alumni of St John's College, Oxford, so understanding it makes those chapters shorter.
In everyday life: Look for Mark Armstrong (economist) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Mark Armstrong (economist) in 20 minutes

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Close the page and write down what Mark Armstrong (economist) means in your own words.
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Frequently asked questions

What is Mark Armstrong (economist) in simple terms?

Why does Mark Armstrong (economist) matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Mark Armstrong (economist)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Mark Armstrong (economist).