- 1 Introduction
- 2 The Model
- 2.1 Unobservable Contributions
- 2.2 Observable Contributions
- 3 Experimental Evidence
- 3.1 Experimental Design and Procedures
- 3.2 Hypotheses
- 3.3 Results
- 4 Discussion
- 5 Appendix
- References
Persistent link: https://ebvufind01.dmz1.zbw.eu/10005868020