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martha

Interesting post. The problem that I have is that anyone who looks out more than five years is crazy. Projecting auto demand in a linear fashion is beyond childish. Seriously, with this post you seem to be breaking from many of your excellent observations - forecasting over long periods of time and assuming linearity.

Steve Castellano

You are right, in a way. In the 1950s nuclear power was the holy grail to the American economy, and 50-year forecasts showed a nuclear power plant in every city, town and villa. So much for the accuracy of those forecasts.

But that was forecasting the emergence of a technology. Forecasting bandwidth-driven revenue among the telecom services companies more recently was also a forecast of transitioning technologies. Forecasting revenue based on transitioning technologies is difficult at best, a point made obvious to anyone alive post March 2000.

But forecasting GDP growth of a country is a lot easier -- that is, there are less pitfalls that will interfere with your forecast. So lets look back at 50-year forecasts of the American economy in the 1950s. Whatever assumptions the forecasts were based on, they probably showed some kind of increasing growth (linear, stepped, accelerating -- irrelevant. It was up).

Auto production is a function of GDP growth and more specifically perhaps per capita consumption. We can look at China and see that its demographics and current per capita spending levels suppport the idea that this country has a long ways to grow.

Assuming future expected economic growth, perhaps make an ultimate worse-case estimate. For example, assume that 90% of the Goldman forecast, whatever its asusmptions (I have to assume they are logical since they come from GS) is bogus, that leaves a 2050 figure of 50m estimated autos in China.

In of itself, a worse case estimate illustrates the increasing demand for associated raw materials around the world, driven by China, India and other developing nations. Whether its 50m or 500m by 2050 is not as important as the point it is illustrating -- that future growth is up, and significant.

On the other hand, there are no doubt experts on China, India and autos that are probably make the case that these emerging powers will implode from any number of economic or social crisis. So lets go back to the 1950s 50-year forecasts in the U.S. Perhaps those forecasts should have been dismissed because there was risk of communist uprisings or nucelar war. That there were risks doesn't take away from the need to make an assessment on the future.

So you are right, forecasting more than 2-3 years with any level of detail is suspect. But, to also arbitrarily limit any kind of logical, extraoplated visibility down the road is just as short sighted.

In short, forecasting a function of country GDP is much easier, and more of a high-level exercise, than forecasting the emerging dominance of any particular technology as the key driver of a company's revenue-- though there are dangers to each.

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