An Early Application of the Average Total Cost Concept
介绍19世纪初一家德国音乐出版公司为两种乐谱印刷方法计算并使用了基于产量的平均成本估算，比经济学文献中正式出现平均总成本曲线早了一个世纪。
E BEGAN to conceptualize average total cost functions during the early decades of the twentieth century. But a century before, a German music publishing firm calculated and used in its internal decision making output-dependent average cost estimates for two methods of printing sheet music. This note describes that early experience and juxtaposes against it the relatively late emergence of the ATC curve in the formal literature of economics.