My work implies a lot of econometrics, and I had a good formation about it. Nevertheless, I am regularly faced with some semi or non parametric techniques (for instance I had to use quantile regressions, partial estimation, or nonparametric estimation of whole distribution estimations), and I had no courses about it, neither in statistics or econometrics.
So my question is which book would you recommend for someone to have both a good overview and a logical presentation of this domain ? I would like to have a good background for these techniques. I precise that I have a graduate level in econometrics and applied statistics, so some maths are fine, but with some intuition is very good too !
Thanks in advance