Ed Glaeser wrote on this back in 2009.

厄德·格莱泽在2009年如此写道。

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Both Mr Kotkin and Mr Glaeser could be right.

科特金先生和格雷泽先生的看法可能都是正确的。

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"THE world isn't flat," writes Edward Glaeser, "it's paved."

“世界本不是平的”，爱德华·格莱泽如是写道，“是被铺平的”。

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But Ed Glaeser, an economist, argues that clusters of clever workers themselves enhance productivity.

ECONOMIST: American firms are hiring again, but hold the cheers

Rather than blaming culture or taxes, Messrs Alesina, Glaeser and Sacerdote instead credit trade unions.

ECONOMIST: Economics focus

Messrs Alesina, Glaeser and Sacerdote think this principle might help to explain why Europeans work so much less than Americans.

ECONOMIST: Economics focus