*Updated 2014-8-31.
- Cleanup
- Merge
- PIPE
- PWT80
- Czechoslovakia, yugoslavia, yemensouth, germany
- ddrevisted
- 6% unmatched
- Archigos
- Maddison
- 7.91% uncovered
- Basic Trend Table
- Selection mechanism / barrier to entry
- Education
- CIS countries: 3.8, 3.12
- Age & gender
- Experience
- length_ce: 5.2, 5.3, 5.4
- Correlation analysis
- Regression