Martinez-Silva, I., Roca-Pardinas, J., Lustres-Perez, V., Lorenzo-Arribas, A. and Cadarso-Suarez, C.
Statistics and Operations Research Transactions 37(1), 81-94.
Boosting, quantile regression, reference curves, smoothness.
||In many applications, it is often of interest to assess the possible relationships between covariates and
quantiles of a response variable through a regression model. In some instances, the effects of continuous
covariates on the outcome are highly nonlinear. Consequently, appropriate modeling has to take such
flexible smooth effects into account. In this work, various flexible quantile regression techniques were reviewed and
compared by simulation. Finally, all the techniques were used to construct the overall zone specific reference
curves of morphologic measures of sea urchin Paracentrotus lividus (Lamarck, 1816) located in NW Spain.