The economic and psychological literatures have demonstrated that early investments (private and public) in children can significantly increase cognitive outcomes in the short and long term and contribute to success later in life. One of the most important of these inputs is maternal time....

This paper exploits a unique universal educational policy - implemented in most German states between 2001 and 2008 - that compressed the academic-track high school curriculum into a (one year) shorter time span, thereby increasing time of instruction and share of curriculum taught per grade....