TY - GEN digital ID - 132478033 TI - The effect heterogeneity of central exams: evidence fro TIMSS, TIMSS-repeat and PISA PY - 2004 PB - Munich CESifo DB - UniCat KW - Zonder onderwerpscode: economie UR - https://www.unicat.be/uniCat?func=search&query=sysid:132478033 AB - ER -