求助：各位帮忙找下面两篇文献

1. Gawon Yoon （2009）：“It's all the miners' fault: On the nonlinearity in U.S. unemployment rates“，Economic Modelling，Volume 26, Issue 6, November 2009, Pages 1449-1454 doi:10.1016/j.econmod.2009.07.018


2.  Nonlinearity in real exchange rates: an approach with disaggregated data and a new linearity test
Author: Gawon Yoon a

Affiliation:

a School of Economics, Kookmin University, Seoul, S. Korea

DOI: 10.1080/00036840902817573
Publication Frequency: 18 issues per year
Published in: Applied Economics Letters
First Published on: 03 July 2009

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