Relationship between recycling intensity (proportion of recycled artifacts in a grid square) and skewness of distribution of each artifact’s year of initial discard for each grid square.

Results show for model runs when agents have one of two technology types (overlap = 1) and only 100 agents occupy the landscape during model run. Negative skew indicates artifacts in the assemblage are first discarded earlier in model run. Positive skew indicates artifacts are discarded later in model run. Linear relationship shown by dark blue line. R squared values given in upper left corner of each panel. (TIF)