1 A Monte Carlo comparison of parametric and nonparametric quantile regressions  Authors: Insik Minab; Inchul Kimc Published in: Applied Economics Letters, Volume 11, Issue 2 February 2004 , pages 71 - 74 URL：http://www.informaworld.com/smpp/content~db=all?content=10.1080/1350485042000200132 2 Into thin air: using a quantile regression approach to explore the relationship between R&D and innovation   Authors: Bernd Ebersbergera; Orietta Marsilib; Toke Reichsteinc; Ammon Salterd Published in: International Review of Applied Economics, Volume 24, Issue 1 January 2010 , pages 95 - 102 URL：http://www.informaworld.com/smpp/content~db=all?content=10.1080/02692170903424448 3   Recent Advances in Quantile Regression Models: A Practical Guideline for Empirical Research Authors: M. Buchinsky Journal: Journal of Human Resources URL:  http://www.jstor.org/pss/146316