  We present our progress on the study of extinction laws along three diferent
lines. [a] We compare how well different families of extinction laws fit
existing photometric data for Galactic sightlines and we find that the Ma\'iz
Apell\'aniz et al. (2014) family provides better results than those of Cardelli
et al. (1989) or Fitzpatrick (1999). [b] We describe the HST/STIS
spectrophotometry in the 1700-10 200 Angstrom range that we are obtaining for
several tens of sightlines in 30 Doradus with the purpose of deriving an
improved wavelength-detailed family of extinction laws. [c] We present the
study we are conducting on the behavior of the extinction law in the infrared
by combining 2MASS and WISE photometry with Spitzer and ISO spectrophotometry.
