Book Review: The Power of Habit

The Power of Habit by Charles Duhigg is all about the psychology of habit formation and change. Why then, you may well ask, am I reviewing it here on a blog about behavioural economics? The answer is nudges. Behavioural economists are often interested in things that will change behaviour, and habits are a big part of behaviour. Three examples in the book...

Firstly, an American army major who wanted to stop regular riots in the small Iraqi city of Kufa. People would slowly gather over the course of a few hours in the central plazas and after a while violence would break out. The major had an idea of how to nudge a crowd into staying peaceful: Stop food vendors entering the plazas. The usual practice was for food sellers to enter the crowd, but by stopping them from doing so the crowd got hungry, and so started to dissipate. There were no riots after the food vendors were stopped from supplying food to angry crowds.

Secondly, McDonald's in their attempts to get people to buy their food out of habit. One of the key insights into habit formation is that each habit has a specific cue. McDonald's realised that they needed to keep the same cues across outlets. Thus each McDonald's looks the same, smells the same and sells exactly the same food. Whatever sparks your habit of buying McDonald's, the same cue will exist at all outlets. Thus your habit is mobile - you don't need to be near your local McDonald's to feed your Big Mac habit.

Thirdly, retailers in their highly successful bid to understand consumers better. Big shops have been collecting data on their customers for decades, but recently they've made a breakthrough: consumer habits (and thus purchasing patterns) change in predictable ways as people face major life events. Retailers realised that if a woman started to buy baby clothes and pregnancy drugs she was likely to be pregnant. Having a baby is a big life event (apparently). Having a baby considerably alters purchasing habits, meaning that marketing at this eventful time is likely to be more successful. The result: shops target (likely) new parents with adverts for products like nappies. They nudge people into buying their products.

My one complaint with The Power of Habit is that not all human behaviour can be called a 'habit'. You cannot explain everything through habits. Having said that, even the non-habits covered by Duhigg are incredibly interesting. In conclusion, I thoroughly recommend The Power of Habit (whether you be an addict or just interested in behavioural economics) but I do not necessarily buy into the book's central argument.

Genre: Psychology
Accessibility: 10/10
Accuracy: 6/10
Readability: 10/10
Usefulness: 8/10
Verdict: A Very Good Read

Tesco Nappies

Own brand products are ubiquitous in supermarkets. Why are they there? How do the supermarkets convince us to buy them?

As I walked around Tesco earlier today I noticed the huge similarity between Tesco own brand goods and branded items (made by a separate supplier).

Let's take the example of nappies. Here Pampers (owned by Proctor and Gamble) is the leading brand. They occupied about 60% of the shelf space in the nappy category. Approximately 20% were Huggies and a further 20% were own brand; Tesco. (This is a rough guide of market share).

The first question is why were Tesco competing with P&G in the nappy market anyway?

The answer lies in the profit margin. By selling their own goods, supermarkets cut out the middleman. They make more money selling their own brand goods than branded ones. However, each individual product space, or 'facing', is at a premium. The rate of sale is important. This leads us onto the second question.

How does Tesco convince us to buy their own brand products?

When an own brand product is in direct competition with a branded one, like the nappies pictured, the supermarket will try to convince us that their (usually) cheaper product does "just as good a job". It uses tricks such as the following to promote similarity between the different products:

• Placement. Own brand goods are often placed right next to branded ones, and often in the best position ("eye-level is buy-level").
• Colour. The pictures of the nappies above are a textbook example of a supermarket copying the colour of the market leader. Colour is of huge importance in our brains, and colour schemes are nicked wholesale from the branded goods.
• Emotional intent. There is a picture of a smiling baby on every pack of nappies in the store (the one exception is a line of uber-cheap Tesco nappies, occupying a tiny section of the bottom shelf).
• General aspects of design. For example, the number of nappies is on the bottom right corner.
• Packaging. Both types of nappies come in similar plastic packaging, and are of similar size.

Thus supermarkets use psychology and behavioural economics in an attempt to persuade that their product is just as good.

Does that make us fools for buying own brand goods??

No. Well, not necessarily. The own brand stuff may genuinely be just as good, or even better. Remember, branded goods are constantly trying to keep you loyal. They do not like it when you try out the competitors - they might be better!

Conclusion?

Be rational.

Realistic conclusion?

At least try to be aware of what shops and suppliers are trying to make you feel, think and do.

How??

Know some behavioural economics!