BBC Sounds, Music, Radio, Podcasts.

I'm no longer ravenous. I'll no longer eat until I fall asleep.

The Hunger Game, a new five-part series exploring the meteoric rise of weight loss drugs.

It's been an incredible story with these drugs.

The uptake, the amount of product that's been sold, the amounts of money

is cost. What the drugs do, how they work, and the knock-on effects of their widespread use.

We'll be sitting here in three years' time going, oh, it caused problems that we're now going

to have to fix. The Hunger Game with me, Professor Gilesio. Listen first on BBC Sounds.

Hello again. Welcome to the Bottom Line podcast here and broadcast weekly on Radio 4.

This week we're talking about product innovation. Before we get into that, though, I do want to just tell you about a recent episode on self-checkouts.

Total staple in supermarkets these days and

in fast food chains and other shops. Some companies, though, are reconsidering their use.

We look at the economics behind unmanned tills and ask if they're linked to the rise in shoplifting.

Now, though, it's time for today's topic and it was Alfred Sloan,

the legendary President of General Motors between the World Wars, who is always credited

as the man who introduced the concept of the annual model change. He would make tweaks to the

design of his cars each year to keep them fresh. He was building a degree of psychological obsolescence into the older models which immediately

began to feel to be dated.

That's a very interesting piece of business history.

But since then, we've all become used to frequent model changes, not in cars, in everything,

from smartphones to trainers, to cleaning not in cars, in everything, from smartphones to trainers to cleaning

products in confectionery. Products are reformulated, redesigned, revamped, refined, upgraded

...