Pedraja Chaparro, Francisco and Santín González, Daniel and Simancas Rodríguez, Rosa (2013): The Impact of Immigrant Concentration in Schools on Grade Retention in Spain: a Difference-in-Differences Approach.
Cordero, José Manuel and Prior, Diego and Simancas Rodríguez, Rosa (2013): A comparison of public and private schools in Spain using robust nonparametric frontier methods.
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