Quantile regression analysis differs from more conventional regression
models in its emphasis on distributions. Whereas standard regression
procedures show how the expected value of the dependent variable
responds to a change in an explanatory variable, quantile regressions
imply predicted changes for the entire distribution of the dependent
variable. Despite its advantages, quantile regression is still not
commonly used in the analysis of spatial data. The objective of this
book is to make quantile regression procedures more accessible for
researchers working with spatial data sets. The emphasis is on
interpretation of quantile regression results. A series of examples
using both simulated and actual data sets shows how readily seemingly
complex quantile regression results can be interpreted with sets of
well-constructed graphs. Both parametric and nonparametric versions of
spatial models are considered in detail.