ABSTRACT
Ⅰ. Introduction
Ⅱ. Related Literature
Ⅲ. Model Development
Ⅳ. Empirical Analysis
4.1. Data Description
4.2. Model Selection
4.3. Model Results
4.4. Simulation Study to Understand the Impact of Topics on the Length of Session
Ⅴ. Discussion
5.1. Limitations and Future Research