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α: calibrated so average coauthorship-adjusted count equals average raw count
Data for metals sold on commodity exchanges and at prices set by producers are used to test the relationship between the organization of markets and the behavior of prices. On the production side the question is whether prices are more stable in concentrated industries. And on the sales side the question is whether markets where buyers are consumers have more stable prices than those with consumers and speculators. The recent increase in metal-price instability is explained by changes in the market-structure and organization variables. Foremost is increased reliance on commodity exchanges. Declines in concentration are of less importance.