Table 4: Predicted numbers of QSOs, 3<z<8.
Sample Observed at z>3 Analysis type Contributors Predicted $^\dag ~3<z<8$

Single survey cutoff:

3 11.4 single cutoff, $\alpha = +0.2$ 73(86) 64.7(66.7)

3 11.4 single cutoff, $\alpha = \ \ 0.0$ 49(57) 40.3(40.4)

3 11.4 single cutoff, $\alpha = -0.2$ 39(43) 25.0(25.1)

Source-by-source analysis, "Single-source survey'':

2 17.8 S_2.7, S_5.0 71(89) 51.5(53.5)

2 17.8 S_0.365, S_1.40, S_2.7, S_5.0 67(89) 48.5(54.0)

2 17.8 S_0.365, S_1.40, S_2.7, S_5.0, S_8.40 53(65) 28.8(30.1)

2 17.8 S_0.365, S_1.40, S_2.7, S_5.0, S_8.87 or S_8.40 57(70) 38.6(38.6)

2 17.8 S_0.365, S_1.40, S_2.7, S_5.0, S_8.87 70(88) 50.5(52.9)

$^\dag$ Calculated in the geometry adopted for this paper; bracketed numbers
are for $\Omega_{\rm m} = \Omega_{\rm tot} = 1.0$ , the Einstein-de Sitter Universe.

**Table 4:** Predicted numbers of QSOs, 3<z<8.
Sample	Observed at z>3	Analysis type	Contributors	Predicted $^\dag ~3<z<8$
Single survey cutoff:
3	11.4	single cutoff, $\alpha = +0.2$	73(86)	64.7(66.7)
3	11.4	single cutoff, $\alpha = \ \ 0.0$	49(57)	40.3(40.4)
3	11.4	single cutoff, $\alpha = -0.2$	39(43)	25.0(25.1)
Source-by-source analysis, "Single-source survey'':
2	17.8	S_2.7, S_5.0	71(89)	51.5(53.5)
2	17.8	S_0.365, S_1.40, S_2.7, S_5.0	67(89)	48.5(54.0)
2	17.8	S_0.365, S_1.40, S_2.7, S_5.0, S_8.40	53(65)	28.8(30.1)
2	17.8	S_0.365, S_1.40, S_2.7, S_5.0, S_8.87 or S_8.40	57(70)	38.6(38.6)
2	17.8	S_0.365, S_1.40, S_2.7, S_5.0, S_8.87	70(88)	50.5(52.9)

Source LaTeX | All tables | In the text

	1 Introduction
	2 The redshift distribution
	3 The Radio Luminosity Function (RLF)
	4 The redshift cutoff
	5 The form of the evolution
	6 Summary
	References