Author: Daniele Malesani
Abstract: Thanks to their origin from young stars, long-duration gamma-ray bursts have been claimed to be tracers of star formation at low and high redshift. Recently, large and unbiased samples of GRBs and GRB hosts have become available, allowing a more complete census of GRB environments, and showing that GRBs are hosted in star-forming galaxies spanning a broad range of properties. Yet, it is still not obvious whether GRBs truly trace the cosmic star formation rate. I will present a review of GRB properties, as derived from both host observations and indirectly from afterglow spectra.