Porter and Kramer (2006:81) have also questioned the problem of diverse and inconsistent measures of what are allegedly the same construct. In assessing social
impact, people can use indexes which use vastly different criteria, e.g., the Dow Jones Sustainability Index (which includes economic performance in its index, and weights customer service nearly 50 percent more than corporate citizenship) or the FTSE4Good Index (which includes neither economic performance nor customer service).