Nonextreme regression quantiles are estimated nonparametrically on the basis of local polynomial approximations to the true conditional quantile function. The consistency of the estimator is shown. The asymptotic normality is proven and the asymptotic confidence interval for the regression...

Variational Bayesian methods aim to address some of the weaknesses (computation time, storage costs and convergence monitoring) of mainstream MCMCbased inference at the cost of a biased approximation to the posterior distribution. We investigate the performance of variational approximations in...

The concept of willingness-to-pay (WTP) has attracted the attention of marketeers because of its use-fulness in many applications. Nowadays one aims at describing the market heterogeneity by estimating the distribution of WTP. However, this poses several problems that have been discussed...