A new Malmquist-type index to analyze two or more groups of DMU when only a pseudo-panel database is available.
Extends Camanho and Dyson's one-period Malmquist-type index approach.
This new index is useful for comparing schools using databases like PISA or TIMSS.
We provide a comparison between public and private school performance in the Basque Country.
Results show that private schools outperform the public ones.