This article reviews the scholarship on semi-presidentialism since the early 1990s.We identify three waves of semi-presidential studies. The first wave focused on the concept of semi-presidentialism, how it should be defined, and what countries should be classified as semi-presidential. The second wave examined the effect of semi-presidential institutions on newly democratized countries. argues that the concept of semi-presidentialism remains taxonomically valid, but that the empirical scholarship on countries with semi-presidential institutions needs to respond to broader developments within the discipline if it is to remain relevant.
KeywordsSemi-presidentialism; comparative politics; democratization; political scienceIn the 1990s, the long-running debate about presidential and parliamentary government was given new urgency and focus following the collapse of communism. This debate was also marked by the beginning of a new era of work on semi-presidentialism. This article reviews the scholarship on semipresidentialism since this time. We identify three waves of semi-presidential studies. Without implying that work consistent with one wave had to end before another could start, we show that the first wave focused on the concept of semipresidentialism, how it should be defined, and what countries should be classified as semi-presidential. The second wave examined the effect of semipresidential institutions on newly democratized countries. Does semipresidentialism help or hinder the process of democratic consolidation? The third wave examines the effect of semi-presidential institutions on both recent and consolidated democracies, focusing on issues such as government formation and termination. In addition to providing an overview of the three waves of semipresidential studies, the article also identifies three challenges to the contemporary scholarship on semi-presidentialism. The first reflects the shift from the study of semi-presidentialism to the effects of presidential power; the second concerns a more general skepticism regarding the importance ascribed to formal elite-level political institutions on the process of democratization; the third is derived from concerns about how best to study of the causal effects of institutions generally. Having discussed these challenges, the article concludes by arguing that the concept of semi-presidentialism remains taxonomically valid, but that the empirical scholarship on countries with semi-presidential institutions needs to respond to broader developments within the discipline if it is to remain relevant. The definition that was formulated by Duverger in 1970 and that was then popularized in 1980 generated a debate about how the concept of semi-presidentialism should be defined and, by extension, which countries should be classed as semi-presidential.
THE FIRST WAVE: DEFINITIONS AND CLASSIFICATIONSDuverger defined a political regime as semi-presidential:if the constitution which established it combines three elements: (1) the president of the republic is ele...