Introduction 1
1 History of the Concept 7
Kurt Lewin's"Theory of Channels and Gate Keepers" 8
David Manning White and"Mr.Gates" 14
Other Gatekeeping Models 16
Gatekeeping and the General Communication Process 23
2 The Gatekeeping Process 28
Antecedents of Gatekeeping 28
Social Roles of Gatekeeping 41
3 Theorizing About Gatekeeping 50
Individual Level 52
Communication Routines Level 74
Organizational Level 82
Extramedia,Social/Institutional Level 94
Social System Level 105
4 A New Gatekeeping Model 111
5 Future Research 116
References 120
Author Index 131
About the Author 136