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We thus have a classic case of the Jevons effect. Teller labor was an input into an output that we can call “financial services.” ATMs allowed us to produce that output more efficiently and economize on the use of the labor input. But demand for the output was sufficiently elastic that more efficient production meant more demand: and demand increased to the point that there was actually greater demand for the labor input as well. And—this part is not quite the classic Jevons effect—the greater demand suggested to banks that there had been certain functions that were previously considered incidental to the teller job, like “relationship banking,” which were actually quite useful. And so ATMs were a truly complementary technology for the bank teller.。业内人士推荐搜狗输入法作为进阶阅读
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二是生产工艺落后，缺乏现代化清洗、去腥技术，只能依赖化学物质实现清洁效果。
Российский учитель упал замертво во время урокаВ Тамбовской области учитель упал замертво во время урока。超级权重是该领域的重要参考