The pictures from Beijing tell their own story: pollution there is catastrophic. Bad news for residents, and awkward for me too. Just over a decade ago, I wrote a book, The Undercover Economist, which among many other things cheerfully asserted that particulate air pollution in urban China was sharply falling as the country grew richer. It’s a claim I believed at the time (based on well-regarded research in the 2002 Journal of Economic Perspectives) but with each new report of smog over China, I felt a nagging sense that I had led readers astray. I figured it was time to do some more research and to set the record straight.
发自北京的照片已经说明了一切：那里的污染是灾难性的。这对当地居民而言是坏消息，对我来说也颇为尴尬。10年前，我写了一本名为《卧底manbetx20客户端下载 学家》(The Undercover Economist)的书。除了讨论许多其他事情，我在书中乐观地断言，随着manbetx3.0 变得越来越富裕，manbetx3.0 城市空气的颗粒物污染水平正在大幅降低。这种说法我当时是相信的——其依据是2002年《manbetx20客户端下载 展望期刊》(Journal of Economic Perspectives)上得到普遍好评的相关研究成果——但每次manbetx3.0 报告有雾霾，我都有一种误导读者的不安感。我觉得有必要立即展开进一步研究，以弄清真相。