for color-dependent selection effects due to different SEDs of BALQSO and nonBALQSOs, is $13.4\pm1.2$% and shows no significant redshift dependence for $1.7 \le z \le 3.45$. After a rough completeness correction for the effects of dust extinction, we find that approximately one in every six quasars is a BALQSO.'
author:
- 'Timothy A. Reichard, Gordon T. Richards, Patrick B. Hall, Donald P. Schneider, Daniel E. Vanden Berk, Xiaohui Fan, Donald G. York, G.R. Knapp, and J. Brinkmann'
title: 'Continuum and Emission-Line Properties of Broad Absorption Line Quasars'
---

Introduction
============

The continuum and emission-line properties of broad absorption line quasars (BALQSOs) have been the subject of a number of previous studies. The primary goal of such work is to determine if BALQSOs are drawn from the same parent population as nonBALQSOs. If the average continuum and emission-line properties of BALQSOs and nonBALQSOs are in good agreement, then we can be reasonably certain that they are drawn from the same parent population ([Weymann]{} [et al.]{} 1991). If there are significant differences, it could be argued that BALQSOs are a completely different class of quasar ([Surdej]{} & [Hutsemekers]{} 1987; [Boroson]{} & [Meyers]{} 1992). It could also be that the physical mechanism(s) that 