The economy is like a rainforest

The news always speaks of "the economy" as though it was one homogeneous whole. In fact, it's a host of micro-economies, financial equivalents of ecological niches.

In the rainforest, there are places that are light or dark, hot or cool, high or low, wet or dry. In the economy, there are savers, borrowers, amateur and professional investors, crooks, marks, young bold, cautious old, workers, shirkers and berserkers.

So centralised economic policy is enormously difficult. An intervention that helps one part, may hurt another, and further action is implied. It's like the tablets for hypertension that give you gout, which means you need tablets for the gout, which are likely to harm the lining of your stomach. Some might say, throw the lot away and have a glass of sherry before bedtime.

Or, in rainforest terms, let each species find its niche and organise its own survival strategies.

But I don't think this is an argument for complete liberal laissez-faire. To extend the analogy, maybe it's better to prevent harm than to seek to do good; the forest guardians need to control the rubber and banana companies, the clear-cutting loggers and polluting miners.

Fasten your seatbelts

"Chervil" (author of the Australian Green Living blog) has kindly directed me to this article in the Sydney Morning Herald, which refers to ideas about economic long cycles:

David Hackett Fischer has studied the behaviour and historical meaning of inflation not just over the last decade, or the last century, but over the last 800 years. He sees the world positioned in a dangerous moment of possibility, on the rearing crest of the fourth great wave of inflation in eight centuries.

I would still be grateful for any information about what I shall call "sim economics" - potentially so much more useful than other simulation games.

Anybody able to help, please?

Help required: economic modelling

Following reported opinion from Marc Faber and others that we may expect sell-offs in commodities, bonds, equities and real estate, and given concerns about the quality of our currencies, the question arises, where should we hold our cash?

It seem that in the USA and UK, we are holding down interest rates to avoid crippling homeowners, the home-loan-based economy, and what's left of our industries, and also in the hope that we can repay our debts to foreigners with devalued cash. On the other side, countries like China and Japan seem to be trying to prevent their currencies from appreciating, so as to preserve their trading advantage.

So one party is letting their currencies sink, and the other is trying to stop theirs rising. To this amateur, the world's foreign exchange system looks like a bunch of corks tied to an unchained anchor and flung into the sea. Will the string on the corks hold, or break under the strain, or be abruptly cut?

Is there any computer- or board-game-based model of the world economic system, that might make it clear to me how this wretched thing works?

And how is the ordinary person to save money and preserve its value in real terms, without having to be super-sophisticated? I know something about American TIPS and British NS&I Index-Linked Savings Certifcates, but I'm leery of handing the government what little money they haven't already extracted from me in taxes. And I don't trust them to define inflation fairly.

Does anybody know how this boneshaker of a contraption actually operates, so we can make sensible decisions?