  For La-doped BaSnO$_\text{3}$ thin films grown by pulsed laser deposition, we
combine chemical surface characterization and electronic transport studies to
probe the evolution of electronic states in the band structure for different
La-doping content. Systematic analyses of spectroscopic data based on fitting
the core electron line shapes help to unravel the composition of the surface as
well as the dynamics associated with increasing doping. This dynamics is
observed with a more pronounced signature in the Sn 3d core level, which
exhibits an increasing asymmetry to the high binding energy side of the peak
with increasing electron density. The present results expand the current
understanding of the interplay between the doping concentration, electronic
band structure and transport properties of epitaxial La:BaSnO$_\text{3}$ films.
