1. Introduction

2. The Sample

3. Measurement of Emission Line Widths

4. Results
4.1. Estimation of Black Hole Masses
4.2. Eddington ratios

5. Black hole mass function and Eddington ratio distribution function

6. Reconstruction of the intrinsic BHMF and ERDF
6.2. Results

7. Discussion
7.1. Active fraction of local black holes
7.2. The active black hole mass density
7.3. Comparison with other surveys
7.4. Evolution of the active fraction

8. Conclusions