THE EFFECT OF A CHANGE IN LANGUAGE OF INSTRUCTION ON THE RETURNS TO SCHOOLING IN MOROCCO

Until 1983, the language of instruction for most subjects in grades 6 and above in Moroccan public schools was French. Beginning in 1983, th e language of instruction for new cohorts of Moroccan sixth graders wa s switched to Arabic. We use this policy change to estimate the effect of French language skills on test scores and earnings. The estimates suggest that the elimination of compulsory French instruction led to a substantial reduction in the returns to schooling for Moroccans affec ted by the change. This reduction appears to be largely attributable t o a loss of French writing skills.