This document discusses the institutional approach to comparative political analysis. It begins by outlining the objectives of understanding what constitutes the institutional approach, its units and questions of comparison, and how it explains differences and similarities. The next sections provide an overview of the historical development of the institutional approach from ancient thinkers like Aristotle to its emergence as a predominant approach in comparative politics in the late 19th century, especially through the works of thinkers like Bryce, Lowell and Ostrogorski. It notes some key characteristics and limitations of the institutional approach, such as its focus on formal legal institutions and ethnocentric view of Western liberal democracies.