Recent years have seen a proliferation of composite indicators or indexes of governance and their use in research and policy-making. This article proposes a framework of 10 questions to guide both the development and evaluation of such indexes. In reviewing these 10 questions -only six of which, it argues, are criticalthe paper advances two broad arguments: First, more attention should be paid to the fundamentals of social science methodology, that is, concept formation, content validity, reliability, replicability, robustness, and the relevance of particular measures to underlying research questions. Second, less attention should be paid to other issues more commonly highlighted in the literature on governance measurement, that is, descriptive complexity, theoretical fit, the precision of estimates, and 'correct' weighting. The paper builds on review of the literature and on three years of research in practice in developing a well-known governance index.
A considerable body of research suggests that horizontal inequality between ethnic groups has major socioeconomic implications, in particular for peace and economic development. Much of this work focuses on horizontal inequality as an independent causal variable, rather than an outcome of various processes. We offer conceptual, theoretical, and empirical reasons for treating horizontal inequality as an outcome and challenging assumptions of fixity. We first consider explanations for variation drawing on the literature on horizontal inequality, as well as on ethnicity more broadly. We then explore how horizontal inequality can be measured using survey and census data, and present analysis based on two datasets providing information on inequality in terms of educational attainment (HI-E) for the 1960s to 2000s. These data suggest both a general trend toward decline in HI-E over time and considerable regional variation. This article serves also to introduce and frame the contributions to this special section.
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