than a factor of 2 at higher z and now only around 25% , with very low significance. Moreover, at variance with the previous work the age range spanned by and is basically equal.\
In P09 we found that amongst the  at redshift 3 to 6 there was a significant lack of massive galaxies with high EW. In other words, although there was no clear correlation between EW and stellar mass, all galaxies with $EW_0 > 80 \AA$ (9 out of a sample of 70) had stellar masses equal or below the median mass. There are only 3 galaxies with $EW_0 > 80\AA$ in the present sample and their masses are indeed all lower that the median mass. Therefore the effect might be present, but is definitely much less pronounced than at higher redshift.\
The E(B-V) derived from the SED fit are small, with a median value of 0.06$\pm 0.012$ and 0.03$\pm 0.009$ for  and respectively. In accordance with previous results at higher redshift (P07) and with Shapley et al. (2003), we find that  tend to show less dust extinction: the difference between the sub-sample is small but significant(PKS=0.012). To confirm this result, we also evaluated the continuum UV-slope from 