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Tag Archives: mass production

Invention, Profit and Economic Growth

Saying that profit, not necessity is the mother of invention, economic historian John Steele Gordon starts his column in this week’s Barrons. His focus was the 18th century clipper ships that earned people like John Jacob Astor $50,000 for a single voyage between the US and China. Furs went to China, tea returned and, because of the invention of the clipper ship, the voyage was faster than ever before.

More speed, more trips, more profits.

The Gordon column reminded me of a book I always enjoy rereading. In How We Got Here, Andy Kessler looks at a history of technology and markets. Echoing Gordon, Kessler takes the reader through the history of the steam engine. He begins with 18th century English coal mines that flooded because they were below water level. Realizing miners needed something better than their vertical bucket brigade, Thomas Savery invented the Miner’s Friend, a steam powered mechanized pump.

Here we can fast forward, from the first steam engines to the steamboat (yes, there is lots in between). But that gets us back to the clipper ship and again, how the quest for profits leads to invention. When steam power became cheap enough, because of their speed and cargo capacity (10 times more than sailing vessels), steamboats replaced clipper ships. Merchants, whose transport costs could run as high as three-quarters of the price of an exported good, saw their opportunity.

Again, more voyages, higher volume, lower prices, bigger profits and soon, the next invention.

Wouldn’t Adam Smith (mass production) and David Ricardo (free trade) both be smiling?

Sources and Resources: Happily, here you can easily take a look at the Kessler book (my source for steamship stats) while the Gordon article is here. For good brief bios on Smith and Ricardo, the econlib library, here and here, is a handy link.

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Potato chip manufacture is a technological marvel.

During one year, in one typical factory, the chips in 80 million bags of Lay’s Potato Chips started as potatoes that were picked and plunked into railroad cars, funneled out for washing and processing at the factory, peeled, sliced, baked and sprinkled with salt as they moved at 15 to 65 mph along an assembly line. After the burnt and malformed chips were identified by a quality control camera and eliminated by a puff of air, the others were bagged, boxed and sent to us.

According to this wonderful Econtalk podcast, potato chip makers care very much about productivity. They innovate to expedite the assembly line, they trouble shoot for bottlenecks, they care about consistency and quality control. The results are a perfect example of huge economies of scale.

Lay’s potato chips are good for us because they are good for the GDP

Here, you can see some of the manufacturing process and here you can read about the division of labor.

Finally, here, in this very funny I Love Lucy video clip, you can see another kind of assembly line.

The Economic Lesson

The private rate of return–the net amount a business gets from an investment–tends to vary considerably and can ultimately be nonexistent because of competition. Moving beyond its origin, as the impact of the innovation ripples through society positively and negatively, it creates a social return. Both are tough to calculate. Edwin Mansfield, a University of Pennsylvania economist (1930-1967) who studied the impact of innovation concluded that smaller innovations such as new industrial thread had a much greater social rate of return than products and processes that sound more dramatic.

Potato chip technology might have more of an impact than we suspect.

An Economic Question: Made of potatoes, salt and oil, a potato chip has a supply chain that enables it to reach us at the supermarket. What might that supply chain include?

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