Category Archives: Uncategorized

Unemployment – a ‘luxury good’ in the developing world

Image result for unemployment in developing countriesFollowing from my last post about the welfare state, the lack of jobless benefits in developing countries has led to very low unemployment levels as workers simply cannot afford not to work. In order for them to survive they need to be prepared to do any sort of job. Even if unemployment benefits are available a lot of the time they are not worth the effort. In Thailand, for example, payments last six months and range from 1,650 baht per month ($52) to 15,000. To be eligible, a Thai worker must register with the social-security office. But only one in three does so.

Therefore if they have lost their job what do they do? A laid-off factory worker might lend a hand on the family farm, become a casual day labourer, or sell trinkets on the street. When Annan Chanthan left his job as a graphic designer in Bangkok five years ago, he thought about collecting unemployment benefits, but never bothered. He now earns more money selling lottery tickets next to Hua Lamphong railway station than he did in his former profession.

But the situation can be complicated in developing countries, with their large informal sectors, which offer a relatively easy way for unemployed people to pick up some income — undetected by the government — while they continue to receive jobless benefits. However the level of the unemployment benefit influence the duration of the period of unemployment, but it doesn’t really help workers find better jobs (such as those that pay a higher wage). However, the level of the benefit does seem to improve wages somewhat, although not the unemployment duration.

In poor countries, unemployment is paradoxically concentrated among the better off and better educated. They can afford to wait a bit for a job that matches their aspirations and qualifications. Their behaviour may also explain unemployment’s curious stability but when times are bad, they may settle for a worse job or stop looking, rather than wait longer, which would add to the rate of unemployment.

Source: The Economist June 9th 2018 – The luxury of unemployment



AS Revision – Income Elasticity of Demand graph

Currently taking CIE revision classes this holiday and was working through Unit 2 and income elasticity of demand. Quite a few of the class had never come across this graph which is popular in multiple-choice questions. It is important that you read the axis.

Usefulness of Income Elasticity of Demand

Knowledge of income elasticity of demand for different products helps firms predict the effect of a business cycle on sales. All countries experience a business cycle where actual GDP moves up and down in a regular pattern causing booms and slowdowns or perhaps a recession. The business cycle means incomes rise and fall.

Luxury products with high income elasticity see greater sales volatility over the business cycle than necessities where demand from consumers is less sensitive to changes in the economic cycle

The NZ economy has enjoyed a period of economic growth over the last few years. So average real incomes have increased, but because of differences in income elasticity of demand, consumer demand for products will have varied greatly over this period.

Over time we expect to see our real incomes rise. And as we become better off, we can afford to increase our spending on different goods and services. Clearly what is happening to the relative prices of these products will play a key role in shaping our consumption decisions. But the income elasticity of demand will also affect the pattern of demand over time. For normal luxury goods, whose income elasticity of demand exceeds +1, as incomes rise, the proportion of a consumer’s income spent on that product will go up. For normal necessities (income elasticity of demand is positive but less than 1) and for inferior goods (where the income elasticity of demand is negative) – then as income rises, the share or proportion of their budget on these products will fall. See table below for a summary of values.

A2 Revision – Economies of Scale Mind Map

With the A2 exam not far away here is something on Economies of Scale – also a mind map which I have edited from Susan Grant’s book.

When the average cost curve slopes downwards it means that average costs are decreasing as output increases. Whenever this happens the firm is experiencing economies of scale . If on the other hand the average costs are increasing as output increases the firm is experiencing diseconomies of scale . Why do firms experience economies of scale?

Technical Economies: large firms can take advantage of increased capacity machinery. For example, a double-decker bus can carry twice as many passengers as a single decker bus. But without the purchase costs and the running costs are not doubled.

Managerial Economies: In a small firm the manager may perform the role of cost accountant, foreman, salesman, personnel officer, stock controller etc. However, as a firm increases in size it can take advantage of specialisation of labour.

Commercial Economies: The large firm can buy it raw materials in bulk at favourable rates.

Financial Economies: the larger firm can negotiate loans from banks and related institutions     easily and at favourable rates.

Risk-Bearing Economies: All firms are subject to risk at sometime or other. However, the larger firm has distinct advantages in this area as small changes in supply and demand can often ruin a small company and larger firms can cover itself by producing a variety of products for a variety of markets.

Looks like inflation might hit 2% in New Zealand

The ASB Bank produce a very good Economic Report and below are some of the points they make with regard to inflationary pressures – useful for NCEA Level 2 and 3 as well as CIE AS and A2 level. The CPI will be on the rise with higher global commodity prices (see graph below) as well as the weakening NZ dollar which in turn makes imports more expensive.

  • Commodity-price related influences are expected to directly contribute around 1 percentage point to annual CPI inflation over 2018. The direct impact is expected to wane.
  • The period of retail deflation looks like it might be coming to an end. The lower NZD and pending increases in wage costs could see this component add to inflation. The extent to which prices will firm will depend on retail margins.
  • Administered price increases will add roughly half a percentage point to annual inflation despite the impact of the free tertiary fees policy. Higher prices for tobacco and local authority rates seem to be a fact of life: one driven by health objectives, the other by perennial infrastructure demand and a lack of competitive pressure.
  • The labour market is likely to become more of a source of price increases. We note that higher wages need not impact on consumer prices if they are offset by a corresponding increase in labour productivity/trimming in producer margins.
  • Price increases from the housing group are expected to subside. It is no longer a sellers’ market for existing dwellings. The balance of power for building work looks to be increasingly shifting towards the customer and away from the provider. Rental dwelling inflation is expected to remain moderate.

Breakdown of CPI Weighting

Source: ASB Bank – Economic Note – Inflation Watch 26 July 2018

Indifference Curves – Mindmap and Video

Been covering this topic with my A2 class and it is one of the more complex parts of the micro course. The video is particularly useful.

Income and Substitution Effects with Indifference Curves
Any price change can be conveniently analysed into 2 separate effects – the INCOME EFFECT and the SUBSTITUTION EFFECT.

Income effect of a price change: – when there is a fall in the price of a product, the consumer receives a real income effect and is able to buy more of this and other products in spite of the fact that nominal income is unchanged. If the consumer buys more of the good when the price falls it is a Normal good. If the consumer buys less of the good when the price falls it is seen as an Inferior good.

Substitution effect of a price change: – when there is a rise or fall in the price of a product, the consumer receives a decrease or an increase in the utility derived from each unit of money spent on the product and therefore rearranges demand to maximise utility. This is distinct from the income effect of a price change. For all products, the substitution effect is always positive such that a fall in price leads to an increase in demand as consumers realise an increase in the satisfaction they derive from each unit of money spent on the product.

Remember for normal goods, both the income and substitution effects are positive. But the income effect can be negative: if a negative income effect outweighs the positive substitution effect, this means that less is bought at a lower price and vice-versa. This good is therefore known as a Giffen good.

Giffen goods are generally regarded as goods of low quality which are important elements in the expenditure of those on low incomes. A good example is a basic food such as rice, which forms a significant part of the diet of the poor in many countries. The argument, not accepted by all economists, is that when the price of rice falls sufficiently individuals’ real income will rise to an extent that they will be able to afford more attractive substitutes such as fresh fruit or vegetables to makeup their diet and as a result they will actually purchase less rice even though its price has fallen.

New Zealand smokers affected most by inflation.

Smokers in New Zealand are particularly vulnerable to the inflation because the price of cigarettes has been increasing much more rapidly than earnings and the CPI. Māori households are worst affected as the New Zealand Health Survey showed that, in 2016/17, 35% of Māori adults were current smokers, while 15.7% of all adults smoked.

Cigarette and tobacco prices have been subject to annual increase in excise duties since 2010 as a measure to prevent smoking – see graph below. However the addictive nature of the habit – very inelastic demand – makes it very difficult to quit. The majority of smokers would like to stop smoking, and each year about half try to quit permanently.  Yet, only about 6 percent of smokers are able to quit in a given year.  Most smokers will need to make multiple attempts before they are able to quit permanently.

Rather than taxing the product a more realistic solution could be to prevent people from smoking i.e. focusing on the demand side rather than the supply side of taxing cigarettes. I blogged on this last year when discussing the war on drugs. War on drugs: Supply or Demand – that is the question

Demand-Side interventions seem to be a better option and they are also a lot cheaper. Weighing up reducing supply by destroying coca crops in remote areas against drug education in schools and you find the latter is a much more plausible option – see graph below. A dollar spent on drug education in U.S. schools cuts cocaine consumption by twice as much as spending that dollar on reducing supply in South America

Status Quo as the NZ Government makes too much money.
However the Government does make a lot of money from the excise tax – $1,710 million last year which was up $1,068 million from 2010: an increase of 60%. Only 61.7 million was spent on the national control programme in 2014/15 which equated to just 4.1% of the tobacco excise duty collected that year.

Source: BERL NZ

USA China trade war – who would win?

After a third round of trade talks between China and the US ended in stalemate a US$100bn trade war is on the horizon. America has published a list of 1,300 Chinese products which it proposes to hit with a 25% tariff. China has it own list covering 106 categories. As the Chinese embassy in Washington DC said “As the Chinese saying goes, it is only polite to reciprocate.” See graph below from The Economist.

US list covers Chinese products worth – $US$46bn in 2017 – 9% of exports to USA.
Chinese list covers US products worth – US$50bn in 2017 – 38% of exports to China

Historians of trade have an advantage over those who study wars of the military kind. Each side is a trade dispute lays out in detail the products to be affected. That makes it easier to analyse their strategies. Trump’s blunt attack targeting of a particular industry – steel and aluminium – is to supposedly make the industry in the US stronger. China retaliated by placing tariffs on US$0.2bn-worth of iron and steel tubes, pipes and hollow profiles, and US$1.2bn-worth of aluminium waste.

The US face a trade-off between protecting their own industries with import tariffs at the same time as increasing the cost of goods for its consumers. There is also the likelihood of causing disruptions to the US economy by increasing the cost of intermediate goods (aircraft parts, robots, semiconductors) which ultimately leads to higher prices.

Good long-run deal for China

It seems that China has the dominant position for the following reasons:

  • China can stop purchasing US aircraft
  • Impose an embargo on US soybean products
  • Dump US Treasury Bills and other securities
  • Chinese companies could reduce demand for US business services
  • The government could persuade firms not to buy US products

China is indirectly one of America’s biggest employers. China could look to buy all it commercial aircraft from European consortium Airbus rather than Boeing. That move alone wold cost 179,000 US jobs. China controls key components in global supply and production networks

Initially a trade war would mean job losses for both countries but in the long-run with China looking to develop a more domestic led consumption model the export market becomes less significant – Project Syndicate. See video below:

Source:                                                                                                                                                        The Economist – Blow for Blow – April 7th 2018

New Zealand’s regional and per capita GDP.

From the New Zealand Parliamentary Library – April 2018.

  • Auckland region has the largest regional GDP at $101,370 millionWellington region
  • ($35,603 million), and the Canterbury region ($34,933 million). Economic output in the North Island accounted for over 77 percent of total economic output in New Zeala
  • Old with the South Island providing the remaining 22.7 percent.
    The economy expanded by 6.2 percent over the year in nominal terms (not to be confused with real economic growth of 3.7 percent over the year). The Bay of Plenty region grew the most in percentage terms, expanding by nine percent in nominal ter
  • ms, followed by the Northland and Waikato regions (8.2 percent each). In contrast, the Wellington region expanded by 4.6 percent over the year.

The region with the highest GDP per capita was the Taranaki region ($70,863), followed by the Wellington region ($69,851), and the Auckland region ($61,924). The region with the lowest GDP per capita was the Gisborne region, at $39,896 for the year ended March 2017.
The following table shows nominal GDP, the annual percentage change, and GDP per capita for the year ended 31 March 2017 by region.

Source: New Zealand Parliamentary Library. April 2018



Aussie Cricketers, Sandpaper and Game Theory

You will no doubt have heard of the ball tampering episode at the third cricket test in Cape Town between South Africa and Australia. Australian cricketer Cameron Bancroft was caught by a TV camera roughening up the ball with some yellow sandpaper that was kept in his pocket. He was seen later getting rid of the sandpaper down his trousers so that when the umpires asked him about he produced a sunglasses bag. Later on that day at the post play press conference Australian captain Steve Smith came clean with what was a premeditated plan to roughen one side of the ball and so that the Australian bowlers could take advantage of reverse swing. Tampering with the ball is illegal in cricket and the ICC (cricket’s governing body) banned Steve Smith for one game

I have blogged previously on game theory in sport looking at – Penalty Kicks in Football and How doping impacts Athletes, Organisers and Supporters. As prize money and sponsorship deals get bigger, so do the incentives for coaches and players to find ingenious ways to cheat. So how would the sandpaper incident at the third cricket test in Cape Town lend itself to game theory?

Game theory deals with differences of opinion between groups who know each other’s inclination but not their genuine objective or choice. It then concludes the optimum course of action for any rational player. In this scenario the parties involved are the competing cricketers and, although both are better off if neither tampers with the ball, they cannot trust each other so both engage in ball tampering – Prisoners Dilemma. If you introduce an authoritative figure – the International Cricket Council (ICC) – to observe cricketers with many camera angles, the fear of getting caught should ensure that no ball tampering takes place. This is referred to as the inspection game. However as you know it wasn’t the ICC who took strong action over the video footage but Cricket Australia.

Another party that is crucial to cricket is sponsors and the spectators. Their critical role is the potential withdrawal of support which could see the cricket’s demise. Wealth-management company Magellan has terminated its three-year sponsorship agreement with Cricket Australia in response to the ball-tampering scandal worth around AUS$20 million.

A withdrawal of one of these three parties can trigger the withdrawal of the other two. Cricket cannot survive without sponsors, withdrawal of the media restricts the access to the customers, and finally cricket is only attractive for sponsors as long as there are customers. Therefore the strategies of the three parties looks like this:

Cricketers – Ball tamper or Don’t ball tamper (B D)
ICC – Video or No Video (V N)
Sponsors / Spectators – Stay or Leave (S L)

The assumptions are as follows:


B-N-S > D-N-S = cricketers prefer to ball tamper if not videoed.
D-V-S > B-V-L = cricketer prefer not to ball tamper and be videoed = customers stay, over being ball tampering and videoed = customers leave (assuming that customers don’t like ball tampering scandals)


B-N-S > D-V-L = a scandal combined with a loss of customers is worse for organisers than undetected video where customers stay.
D-V-S > D-N-L = videoing and non ball tampering actions with customer support is better for the organisers than not videoing other cricketers when customers leave.

Sponsors / Spectators
B-V-L > B-V-S = customers prefer to withdraw support after a scandal
B-N-S > B-N-L = customers prefer to stay if there is no scandal.
D-V-S > D-T-L = customers prefer to stay if there is no scandal.
D-N-S > D-N-L = customers prefer to stay if there is no scandal.

Ball tampering & Video = Scandal
Ball tampering & No Video, Don’t ball tamper & Video, Don’t ball tamper & No Video = No scandal

Final thought
The vast majority of authorities in today’s sports events would state that their regimes to combat cheating are very stringent. However the likelihood of human deceitfulness is very realistic and in some cases it’s not those that tamper with the cricket ball who are the real cheats but those who have generated an environment where players would be foolish not to.