Google has recently developed a new tool to allow users to create Google-like charts and maps: the Google Application Programming Interface (API) chart. This tool allows the user to create custom PNG pictures by sending an appropriate syntax code over the web. Here we present two Stata programs...

In recent years, more Stata programs have become available for nonparametric regression. The commands mrunning and mlowess make it possible to perform nonparametric regression over several dimensions. These techniques, however, impose the separable additivity of the effect of different...