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mendax [soylentnews.org] writes:

The New York Times published recently an article [nytimes.com] that describes how the Gravity Model formula [wikipedia.org] developed by a practitioner of the the dismal science [wikipedia.org] in the 1960's which predicts the amount of trade between two markets, developed to predict economic performance in modern times, also applied to ancient economic systems, and how economists were able to test the formula. The article whets one's appetite:

One morning, just before dawn, an old man named Assur-idi loaded up two black donkeys. Their burden was 147 pounds of tin, along with 30 textiles, known as kutanum, that were of such rare value that a single garment cost as much as a slave. Assur-idi had spent his life’s savings on the items, because he knew that if he could convey them over the Taurus Mountains to Kanesh, 600 miles away, he could sell them for twice what he paid.

At the city gate, Assur-idi ran into a younger acquaintance, Sharrum-Adad, who said he was heading on the same journey. He offered to take the older man’s donkeys with him and ship the profits back. The two struck a hurried agreement and wrote it up, though they forgot to record some details. Later, Sharrum-­Adad claimed he never knew how many textiles he had been given. Assur-idi spent the subsequent weeks sending increasingly panicked letters to his sons in Kanesh, demanding they track down Sharrum-Adad and claim his profits.

These letters survive as part of a stunning, nearly miraculous window into ancient economics. In general, we know few details about economic life before roughly 1000 A.D. But during one 30-year period — between 1890 and 1860 B.C. — for one community in the town of Kanesh, we know a great deal. Through a series of incredibly unlikely events, archaeologists have uncovered the comprehensive written archive of a few hundred traders who left their hometown Assur, in what is now Iraq, to set up importing businesses in Kanesh, which sat roughly at the center of present-day Turkey and functioned as the hub of a massive global trading system that stretched from Central Asia to Europe. Kanesh’s traders sent letters back and forth with their business partners, carefully written on clay tablets and stored at home in special vaults. [...]

Economists were drawn to the Kanesh archive because it offered an unprecedented chance to see how well the Gravity Model applied in an economy entirely unlike our own. This was trade conducted via donkey, through a land of independent city-states whose legal and cultural systems were totally dissimilar to any we know. But still, the model held up: Ali Hortacsu, a University of Chicago economist on the Kanesh team, says that the trade figures between Assur and Kanesh matched the formula almost perfectly. ‘‘It was a very nice surprise,’’ he told me.

It just goes to show that what's old is new again.

Original Submission