Mark Johnston
@econfix.bsky.social
Mark W. Johnson is co-founder and senior partner at Innosight, a growth strategy consulting firm, which he co-founded with Clayton Christensen in 2000.
Source: Wikipedia
Business
68%
Economics
15%
Coventry City charges high ticket prices for away fans
Championship football club Coventry City have decided to set ticket prices for the Championship game against West Bromwich Albion later this month and the Boxing Day match with Swansea City at £45.…
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Coventry City charges high ticket prices for away fans
econfix.wordpress.com/2025/11/10/c...
econfix.wordpress.com/2025/11/10/c...
A2 Economics multiple-choice: Long-Run Average Cost – Envelope Curve
Another post geared towards the A2 Economics multiple-choice exam next week. Long-run and short-run average costs curves are a popular question in CAIE Economics Paper 3. In the short run at least …
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A2 Economics multiple-choice: Long-Run Average Cost – Envelope Curve
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A2 Revision – Impact of an increase in variable costs in monopolistic competition.
With the A2 multiple-choice paper over the next few days you should note that the impact of an increase in variable costs in monopolistic competition. The graph can throw up a variety of questions …
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A2 Revision – Impact of an increase in variable costs in monopolistic competition.
econfix.wordpress.com/2025/11/05/a...
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Exchange rates and make Argentina great again.
Useful video from the WSJ if you are teaching exchange rates. Argentina has a history of debt defaults, inflation, exchange‑rate volatility; the $20 billion package is portrayed as partly economic …
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Exchange rates and make Argentina great again.
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CIE and NCEA Level 3 revision – Natural Monopoly
In the A2 multiple choice paper (P3) and the NCEA Level 3 Marginal Analysis, natural monopoly is a popular topic . Here are some thoughts on the types of questions they could ask on natural monopol…
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CIE and NCEA Level 3 revision – Natural Monopoly
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Tobacco company profits and price elasticity of demand
The tobacco industry has not been disappointing investors even with the number of people giving up smoking. If you invested US$100 in US tobacco companies you would make a return of US$165. This is…
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Tobacco company profits and price elasticity of demand
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A2 Economics multiplier: multiple-choice question
Another example of a past Paper 3 question which has been quite popular in the last couple of exam sessions. I have changed the data from the original CAIE question. The table shows the values of s…
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A2 Economics multiplier: multiple-choice question
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Copper prices surge – supply and demand
The price of copper has increased by over 14% compared to last year and a tonne of the commodity is now $10,600. According to The Economist the 3 reasons for its increase are supply, demand and eco…
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Copper prices surge – supply and demand
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Subsidy Graph – NCEA economics 3.1 and AS multiple choice
The NCEA Level 3 and AS multiple-choice paper are coming up and a popular question is either a subsidy or indirect tax question. Below is a typical subsidy graph and the question usually asks stude…
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Subsidy Graph – NCEA economics 3.1 and AS multiple choice
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A2 and NCEA Economics Revision- Monetary Policy
With the A2 essay paper this week and the NCEA Level 3 exam next month, below are a couple of mindmaps looking at monetary policy. Monetary policy is the process by which the monetary authority of …
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A2 and NCEA Economics Revision- Monetary Policy
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Mark Johnston
@econfix.bsky.social
· Oct 6
Economics revision – approaching data response questions
The AS Level Paper 2 is tomorrow so below are some thoughts on approaching the data response. These questions are all about deep reading of the extract and interpreting the data/graphs. On too many…
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Economics revision – approaching data response questions
econfix.wordpress.com/2025/10/06/e...
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Mark Johnston
@econfix.bsky.social
· Oct 1
AS economics revision – elasticity of supply
This topic can be part of an essay question in Section B of Paper 2 at AS level – the focus is usually on the usefulness of PES. It refers to the ability of producers to adjust supply to a ch…
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AS economics revision – elasticity of supply
econfix.wordpress.com/2025/10/01/a...
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Mark Johnston
@econfix.bsky.social
· Sep 29
A2 Economics – Perfect labour market and monopsony with a minimum wage
Currently doing Cambridge A Level revision courses for the Association of Cambridge Schools New Zealand (ACSNZ) and today we went through the labour market. Marginal revenue productivity (MRPL) is …
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A2 Economics – Perfect labour market and monopsony with a minimum wage.
econfix.wordpress.com/2025/09/25/a...
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Mark Johnston
@econfix.bsky.social
· Sep 29
Cardboard packaging as an economic indicator
Cardboard packaging often goes unnoticed, yet it is the backbone of the supply chain, with everything from groceries to heavy machinery passing through a box before reaching its destination.A decli…
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Cardboard packaging as an economic indicator
econfix.wordpress.com/2025/09/29/c...
econfix.wordpress.com/2025/09/29/c...
Mark Johnston
@econfix.bsky.social
· Sep 22
How to write AS and A2 essays in Economics
A timely reminder about essay writing for economics as we approach the October external exams. Below is a mindmap on economic systems (market economy) which could be useful as an essay plan. I have…
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How to write AS and A2 essays in Economics
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Mark Johnston
@econfix.bsky.social
· Sep 21
A Level economics revision – the natural rate of unemployment
The natural rate of unemployment is part of the Cambridge A Level course and is usually found in a multiple choice question or essay. Below is a useful video from Marginal Revolution University. Th…
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A Level economics revision – the natural rate of unemployment
econfix.wordpress.com/2025/09/21/a...
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Mark Johnston
@econfix.bsky.social
· Sep 19
AS Economics Revision – Income Elasticity of Demand graph
Here are some revision notes on YED which might be useful for the CIE AS Economics exam in a few weeks time. Quite a few of the class had never come across this graph which is popular in multiple-c…
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AS Economics Revision – Income Elasticity of Demand graph
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Mark Johnston
@econfix.bsky.social
· Sep 16
Positive externalities of nature in Australia
Nature in Australia is vital economic infrastructure. When the value of non-market ecosystem services—such as climate regulation, water purification, pollination, and flood protection—is included, …
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Positive externalities of nature in Australia
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Mark Johnston
@econfix.bsky.social
· Sep 13
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Overtourism and negative externalities
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Mark Johnston
@econfix.bsky.social
· Sep 10
A Level Economics Revision – National Income
GROSS DOMESTIC PRODUCT (GDP) – Under new definitions introduced in the late 1990s, Gross Domestic Product is also known as Gross Value Added. It is defined as the value of output produced wit…
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A Level Economics Revision – National Income
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Mark Johnston
@econfix.bsky.social
· Sep 6
Developing countries move out of US$ debts
Interest payments on developing countries loans have in some cases exceeded 10% of revenues. This surge in public debt servicing costs is alarming, limiting budgets in these countries. In 2023, a h…
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Developing countries move out of US$ debts
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Mark Johnston
@econfix.bsky.social
· Sep 2
A Level and NCEA Economics – monopolistic competition
With NCEA and CIE practice exams approaching, below is a mindmap about monopolistic competition which will hopefully help with revision of the topic. Adapted from Susan Grant – A Level Econom…
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A Level and NCEA Economics – monopolistic competition
econfix.wordpress.com/2025/09/02/a...
econfix.wordpress.com/2025/09/02/a...
Mark Johnston
@econfix.bsky.social
· Aug 31
Role of Price Elasticity of Demand – Wall Street Journal
Below is a very good video from the Wall Street Journal on price elasticity of demand (PED). PED is key to understanding how companies price their products. Consumer spending has held up relatively…
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Role of Price Elasticity of Demand – Wall Street Journal
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Mark Johnston
@econfix.bsky.social
· Aug 24
Debt supercycle and how it works
John Mauldin’s book “End Game: The End of the Debt Supercycle and How it Changes Everything” and his weekly publication ‘Thoughts from the Frontline’ address the topic of debt and in particular whe…
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Debt supercycle and how it works
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econfix.wordpress.com/2025/08/24/d...
Mark Johnston
@econfix.bsky.social
· Aug 17
Indicators of an economy: tractors, concrete, imported cars, length of a ladder etc.
I’ve always been on the lookout for different economic indicators not just GDP per capita. One which (literally) caught my eye was the size of Alan Greenspan’s (former US Fed Chair) briefcase befor…
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Indicators of an economy: tractors, concrete, imported cars, length of a ladder etc.
econfix.wordpress.com/2025/08/17/i...
econfix.wordpress.com/2025/08/17/i...
Mark Johnston
@econfix.bsky.social
· Aug 14
Developing economies debt crisis
Covering development economies debt issues with my CIE A Level class and the video below from the FT looks at the impact of higher interest rates. External debt can be a major obstacle to future ec…
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Developing economies debt crisis
econfix.wordpress.com/2025/08/14/d...
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Mark Johnston
@econfix.bsky.social
· Aug 7
Behavioural Economics course for school students
Today I presented to our Yr 10 students about what to expect in the Yr 11 Economics course in 2026. As we don’t have an external exam in Yr 11 it gives us the ability to include other areas t…
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Behavioural Economics course for school students
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Mark Johnston
@econfix.bsky.social
· Aug 2
Market power, innovation and inequality
In economics issues of competition, growth, and the distribution of their benefits have long been central concerns with the growing concentration of market power in the hands of corporations. Gover…
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Market power, innovation and inequality
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Mark Johnston
@econfix.bsky.social
· Jul 26
AI and unemployment
The rise of Artificial Intelligence and automation is bringing rapid, transformative change to society, especially in the labour force. Most people are unprepared for how fast and deeply these shif…
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AI and unemployment
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