Sometimes a particular product requires such huge investment in machinery and in
developing a skilled labor force that the resulting output can be sold at a low enough
price to be competitive only when some enormous amount of output is produced, because
of what economists call “economies of scale.”
If General Motors produced only a hundred Chevrolets, the cost per car would be
astronomical, since all the expensive machinery and all the engineering research and
development that went into creating the automobile would have to be recovered from the
sale of just 100 vehicles.
It has been estimated that the minimum output of automobiles needed to achieve an
efficient cost per car is somewhere between 200,00 to 400,000 automobiles per year.
Producing in such huge quantities is not a serious problem in a country of the size and
wealth of the United States. But, in a country with a much smaller
population—Australia, for example—there is no way to sell enough cars within the
country to be able to develop and produce automobiles from scratch to sell at prices that
would compete with automobiles produced in much larger quantities overseas.
If you take small countries like South Korea and Taiwan, they have to depend on
international trade to be able to produce on a scale far exceeding what can be sold
domestically.
International trade is necessary for many countries to achieve economies of scale that will
enable them to sell at competitive prices. For some products requiring huge investments
in machinery and research, only a very few large and prosperous countries could reach
the levels of output needed to repay all these costs from domestic sales alone.
International trade creates greater efficiency by allowing more economies of scale, as
well as by taking advantage of each country’s absolute or comparative advantages.
Inventory is a substitute for knowledge. Since you don’t always know just how much inventory you are actually going to need and since inventory costs money, a business enterprise must try to limit how much inventory it has on hand. Those businesses, which have the greatest amount of knowledge and come closest to the optimal size of inventory, will have their profit prospects enhanced. Just as prices in general affect the allocation of resources from one place to another at a given time, so returns on investment affect the allocation of resources from one time period to another. A high rate of return provides incentives for people to save and invest more than they would at a lower rate of return. – A higher rate of return encourages people to consume less in the present so that they may consume more in the future. It allocates resources over time. The present value of an asset is in fact nothing more than its anticipated future returns, added up and discounted for the fac...
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