Abstract 1. Introduction 2. Clause Structure for Simple Sentences and Clause Linkage for Complex in RRG 2.1. RRG Theory of Clause Structure of the Simple Clause: the Layered Structure of the Clause 2.2. RRG Theroy of Linkage for Complex Sentences: Juncture, Nexus, and IRH 3. Korean Causative Constructions and the IRH 3.1. Korean Phrasal Causative Constructions 3.2. Clause Linkage of Phrasal Causative Constructions and the IRH 4. Causation and the IRH in Korean 5. Conclusion References