1 INTRODUCTION

2 THE C IV AND Hβ SAMPLES

3 THE MAXIMIZING MASS PROCEDURE

3.1 Description of the basic procedure
3.2 Analysis of the C IV sample
3.3 Analysis of the Hβ sample

4 QUASAR BH MASS DEPENDENCE ON REDSHIFT

4.1 Combining the Hβ, Mg II and C IV samples
4.2 MBH(z) relationship from z∼0.1 to z∼4
4.3 Comparison with previous results

5 SUMMARY AND DISCUSSION