Figure 1: Illustration of the bias in the estimated BHMF derived from mass estimates. Shown is the true mass function (thick solid black line) for a simulated sample, and the mass function derived from the mass estimateswhen the statistical error in the mass estimates is 0.3 dex (red dashed line), 0.4 dex (green dotdashed line), and 0.5 dex (solid blue thin line). The mass function estimated from the mass estimates is biased, especially at the highMBH end and for large statistical error. 
