The paper:<p><a href="http:&#x2F;&#x2F;www.ddorn.net&#x2F;papers&#x2F;Autor-Dorn-Hanson-ChinaShock.pdf" rel="nofollow">http:&#x2F;&#x2F;www.ddorn.net&#x2F;papers&#x2F;Autor-Dorn-Hanson-ChinaShock.pdf</a>