Counting Rotten Apples: Student Achievement and Score Manipulation in Italian Elementary Schools
Battistin ErichDe Nadai MicheleVuri Daniela
CEIS Research Paper
We derive bounds for the average of math and language scores of elementary school students in Italy correcting for pervasive score manipulation. Information on the fraction of manipulated data is retrieved from a natural experiment that randomly assigns external monitors to schools. We show how bounds can be tightened imposing restrictions on the measurement properties of the manipulation indicator developed by the government agency charged with test administration and data collection. We additionally assume that manipulation is more likely in those classes at the lower end of the distribution of true scores. Our results show that regional rankings by academic performance are reversed once manipulation is properly taken into account.
Keywords: Corrupt sampling; Measurement error; Nonparametric bounds; Partial identification
JEL codes: C14; C31; C81; I21; J24
Date: Monday 08 September 2014
Revision Date: Monday 08 September 2014