Higher-paid CEOs underperform compared with their lower-paid counterparts, according to a study of 429 public companies by research firm MSCI. The average shareholder returns for firms with the lowest-paid CEOs were 39 percent higher over a 10-year period than those for firms with the highest-paid CEOs. "In fact," the MSCI report states, "even after adjusting for company size and sector, companies with lower total summary CEO pay levels more consistently displayed higher long-term investment returns."