Professor Baer earned his BA degree at Northwestern University and his PhD at the University of Chicago. Before joining LSE in 2013, Baer taught at Tulane University, New Orleans, and the University of California, Irvine.

Professor Baer’s research focuses on the connected histories of Christians, Jews, and Muslims in European and Middle Eastern history, from the early modern era to the modern .

His first book, Honored by the Glory of Islam: Conversion and Conquest in Ottoman Europe (Oxford, 2008, Turkish translation, IV. Mehmet Döneminde Osmanlı Avrupasında İhtida ve Fetih, Hil, 2010), analyzes how Muslim proselytizers conceived and practiced converting other Muslims, as well as Christians and Jews to their interpretation of Islam. Honored by the Glory of Islam was awarded the Albert Hourani Prize of the Middle East Studies Association of North America as the best book in Middle East Studies, 2008. The monograph was also short listed as the best first book in the History of Religions by the American Academy of Religion, 2009. He ends Honored by the Glory of Islam with the conversion to Islam of a group of messianic Jews in seventeenth-century Ottoman Salonika, which is the focus of his second monograph, The Dönme: Jewish Converts, Muslim Revolutionaries, and Secular Turks (Stanford, 2010, Turkish translation, Selânikli Dönmeler: Musevilikten Dönenler, Müslüman Devrimciler, ve Laik Türkler, Doğan, 2011). The Dönme is the first complete history of a secretive Ottoman community from its origins to its dissolution in twentieth-century Istanbul. The Dönme was named finalist, Sephardic Culture category at the National Jewish Book Awards, 2010.