Competition and the Market Process

Learning Objectives: Contrast competition in a static sense, defined in terms of market concentration, with competition in a dynamic sense, defined in terms of contestability. Understand the difference between barriers and costs.
Lecture handout: Competition and the market process*

Half of all U.S. publicly traded companies have disappeared within ten years of entering the market (West, 2017, p.12)

The point of this session is to critically examine the economic theory of competition, by contrasting “competition as a market structure”, with “competition as a behavioural activity”. This turns the debate away from market concentration, towards the issue of contestability and sustained competitive advantage. We also see that competition is the driving force of the market process, and how this relates to regulation.

A timely example of anti-trust is the tech industry. See this article by Russell Brandom explaining the case against Amazon, Apple, Facebook and Google. By contrast, Megan McArdle says ‘Yes, Google has a monopoly: who cares?‘ I recommend Ben Evans’ discussion of tech giants and definitions of market share.

There’s a long list of examples of companies that appeared to be in a dominant position, undermined by the perennial force of competition.

Bertrand competition shows how the act of competition can take place even with just two companies. In fact, the concept of competition doesn’t rely on the number of competitors at all. For example this advert reveals how Usain Bolt’s lack of “competition” doesn’t prevent him improving himself.

This is a good explanation of the side by side market/firm diagram, and the process by which perfectly competitive firms make zero profit in equilibrium

Some good examples of daft occupational licensing are in this Twitter thread.

This is a nice example of the difference between complements and substitutes, and whether external economies of scale mean that more competition benefits the competitors:

Consider the following points:

    • What is the value?
    • Are targeted ads better for the consumer than uniform ones?
    • Is Facebook merely a platform? Or a media company?
    • Re network effects: Is it a natural monopoly?
    • How do you regulate zero price products? [Don’t monopoly on pricing power! Do it on barriers to entry.]
    • Barriers or costs?
    • Why do they want to be regulated? Why do you think the congressional hearings took place?
    • Who owns your metadata? Are they really your likes?

These resources form part of my Managerial Economics course map. You can watch the full YouTube playlist here. This page ties into Chapter 5 of ‘Economics: A Complete Guide for Business‘.
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