Abstract
Cross-national research is plagued by several methodological problems that threaten to distort results and hence raise questions concerning the adequacy of substantive findings. The extent and impact of three of these methodological problems—measurement, sampling, and specification errors—are assessed for a recent model of civil conflict developed by Gurr and Duvall. Concepts in their model are measured with two distinct data sets to estimate measurement error; to assess sampling error, measures are applied to a sample of black African nations which were excluded from their analysis; and new concepts are introduced to assess error in theoretical specification. Although all forms of error are found to exist in their work and to have some distorting effects on their model, it is concluded that some of the general model is accurate. However, discovery of (1) the concepts and data sets that contain the greatest error, and (2) the sources of sampling and specification error, is used to improve substantive findings about the causes of manifest political conflict.

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