Corruption Perception Indices: A Comparative Analysis

Naved Ahmad


The empirical literature on corruption has used data on
corruption from three different sources: (i) investigative reports, (ii)
newspapers, and (iii) surveys or questionnaire-based data. Some studies
on corruption are based on case studies and newspaper reports. Studies
by Wedeman (1997); Wade (1982) and Alam (1996) fall in this category.
While these studies have presented an in-depth analysis of corruption,
they do not examine a large sample of countries. Moreover, the
investigative reports require detective work and sometimes connections
with people in high echelons in order to expose corruption. Unlike
investigative reports, access to survey data on corruption enables
researchers to study corruption for a large sample of countries, but at
the same time, raises questions about their subjectivity.1 However, the
subjectivity of these indices is often justified on the ground that
corruption is illegal in nature, and hard to measure

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