Quasi-Experimental Estimates of Class Size Effect in Primary Schools in Poland

Autor/inn/en	Jakubowski, Maciej; Sakowski, Pawel
Titel	Quasi-Experimental Estimates of Class Size Effect in Primary Schools in Poland
Quelle	In: International Journal of Educational Research, 45 (2006) 3, S.202-215 (14 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0883-0355
DOI	10.1016/j.ijer.2006.11.003
Schlagwörter	Foreign Countries; Class Size; Computation; Elementary Schools; Context Effect; Educational Environment; Research Methodology; Evaluation Methods; Effect Size; Poland + Suchen Sie Ihr Suchwort? Ausland; Klassengröße; Elementary school; Grundschule; Volksschule; Lernumgebung; Pädagogische Umwelt; Schulumwelt; Research method; Forschungsmethode; Polen
Abstract	In this paper we analyze class size effects in the case of primary schools in Poland. We use two empirical strategies to avoid endogeneity bias. First, we use average class size in a grade as an instrumental variable for actual class size. This allows us to control for within school selection of pupils with different abilities to classes of different sizes. Additionally, we estimate fixed effects for schools to control for differences between them. Second, we exploit the fact that there is an informal maximum class size rule. We estimate class size effect only for those enrollment levels where some schools decide to add a new class and thus dramatically lower class sizes. For such enrollment levels variance of class size is mainly exogenous and we argue that this allows estimation of quasi-experimental class size effects. In this case we again use average class size as an instrument with enrollment as a key control variable. Using both strategies we obtain similar findings. We found that the positive effects observed with OLS regression disappear when we use instrumental variables. If we avoid endogeneity bias, then class size negatively affects student achievement. However, this effect is rather small. We discuss methodology, possible bias of results and the importance of our findings to current policy issues in Poland. (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10