AS my fine professor of economics at Columbia, C. Lowell Harriss (who just celebrated his 96th birthday) used to tell us, economics is the study of the allocation of scarce goods and services.

在哥伦比亚大学读书时，我的授业良师，经济学教授C·洛厄尔·哈里斯先生（他刚过完96岁生日）跟我们讲过，经济学是一门研究短缺商品和服务分配问题的学问。

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Meanwhile, Harriss also thinks the company could start buying back shares in 2012.

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"Earnings were generally in line with estimates, and they were driven by the increased number of subscribers" says Gabelli analyst Brett Harriss.

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"Churn has decreased as consumers are recovering from the recession and are more willing to pay for services like satellite radio, " Harriss said.

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