"Evidence presented here uses partisan preferences across 16 Sub-Saharan African countries to distinguish these positions. The evidence is inconsistent with the credibility of party commitments to pursue collective ethnic interests: ethnic clustering of political support is less widespread than expected; members of clustered ethnic groups exhibit high rates of partisan disinterest and are only slightly more likely to express a partisan preference; and partisan preferences are more affected by factors, such as gift-giving, often associated with low political credibility." (Quoted from paper)