This plot shows the main coefficient of our regression, equation (1), for narrow Pleiades sites divided by the average number of sites in a cell and 95% confidence intervals for different years. “Entry” refers to sites that are present in a year but not in 750 BC. “Remain” refers to sites that were also present in 750 BC. “Total” refers to all sites. The regressions include controls for latitude, longitude, distance to the coast, and distance to the Fertile Crescent.