Recent results from large surveys of the local universe show that the galaxy-black hole connection is linked to host morphology at a fundamental level and that there are two fundamentally different modes of black hole growth. The fraction of early-type galaxies with actively growing black holes, and therefore the AGN duty cycle, declines significantly with increasing black hole mass. Late-type galaxies exhibit the opposite trend: the fraction of actively growing black holes increases with black hole mass. Issues of AGN selection bias and prospects for near-future efforts with high redshift data are discussed.

ABSTRACT
1. INTRODUCTION
2. CHALLENGES IN QUANTIFYING BLACK HOLE GROWTH ACTIVITY
3. TWO MODES OF CO-EVOLUTION
    3.1. Black Hole Growth in Early-type Galaxies
    3.2. Black Hole Growth in Late-Type Galaxies
4. OUTLOOK FOR OBSERVATIONAL EFFORTS AT HIGH REDSHIFT
REFERENCES

• KEVIN SCHAWINSKI(Department of Physics, Yale University)
• Einstein Fellow(Yale Center for Astronomy and Astrophysics, Yale University)