Abstract
Ⅰ. Introduction
Ⅱ. Literature Review
Ⅲ. Methodology and Data
3.1. Econometric Models
3.2. Estimation Strategy
3.3. Data and variables
IV. Results
4.1. Panel Random Effects and the Driskoll-Kraay Approach
4.2. Heckman’s Sample Selection Model Estimation
4.3. Alternative Sample Selection Models
V. Conclusions
References
논문초록