RT Journal Article T1 Does preschool education attendance matter? Evidence from a natural experiment in Spain A1 Santín González, Daniel A1 Sicilia, Gabriela AB The non-compulsory and non-free of charge character of preschool education level before 3 years old in Spain raises some doubts about the exogenous nature of this variable. This article provides new evidence about the impact of preschool years on educational outcomes by exploiting a peculiar Spanish database that supplies information on two classrooms at fourth grade in primary schools where students were randomly allocated into each group. Using an identification strategy that reproduces a natural experiment, we find that belonging to the group with more average years of preschool education significantly and positively impacts on fourthgrade students’ average outcomes. Particularly, an increase of one standard deviation in the difference in years of preschool attendance results in an increase of 0.16 (0.13) standard deviations in the group achievement for mathematics (reading). In view of the importance of preschool education and considering that preschool attendance before 3 years old is related with socio-economic variables, we conclude that extending free preschool education to the 2-year-old age group in Spain should be considered especially for students in families with less favourablebackgrounds. PB Taylor & Francis SN 0003-6846 YR 2018 FD 2018 LK https://hdl.handle.net/20.500.14352/19044 UL https://hdl.handle.net/20.500.14352/19044 LA eng NO Fundación Ramón Areces NO European Foundation Society and Education DS Docta Complutense RD 15 may 2024