Galaxy bias parameter of the photo-z sample in the spec-z bin i, b_i′ estimated by various methods. The estimate by $C_{\mathit{ii}}\prime$ (blue circles), C_ii′^x (orange squares), and R_ij′ (black dashed line with 1σ error band in gray) are compared with the direct measurements (green triangles). The results for 10 spec-z bins are shown. The data points are offset slightly horizontally for clarity. See the text for details.