your ID: 0257 First Name: Alejo Last Name: Martinez-Sansigre Affiliation: Oxford University/MPIA Title: High-redshift Obscured Quasars Authors: Martinez-Sansigre, A., et al. Topic: 6 Session: oral Abstract: I will describe how using well defined mid-IR and radio selection criteria, we found a population of high-redshift (z~2) type-2 quasars. Modelling our population, we inferred type-2 to type-1 ratio ~2-3:1, so most SMBH growth is obscured by dust. I will also discuss the multi-wavelength properties of the sample.