Maybe the public-sector premium arises from an incentive problem and hence higher public-sector pay can be used as an indicator of poor quality in this sector.
If, as researchers have suggested, some schools in London have a majority of children being privately coached, then how reliable are school test results as an indicator of their teaching quality?
It was the home team who had made the early running but Spurs gave an indicator of their attacking quality when a strike from a tight angle by Giovani dos Santos struck the crossbar.
Nevermind that white applicants had almost double the number of citations for previous work, an indicator many reviewers use as a proxy for research quality.