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The most important numbers of the PCSS 2012 61 educational tracks of the first year in second grade in 59 different schools were selected (with replacement).Among the contacted schools, we had a response rate of 67.6 percent.In total 3,426 15-year old pupils filled in the survey.From 2,085 or 60.9 percent parent-dyads we have full information.We have information about at least one parent for 72.7 percent of the pupils.
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Stored only when both papers are in the corpus — 12 citations exist upstream.
Papers that cite the same references — the relational fallback while embeddings are still backfilling.
Imported from OpenAlex (CC0) — nothing here is generated.