A study by Harford Funds shows that companies that raise their dividends outperform those that don't, with significantly less volatility.The stock market is a great way to build long-term wealth. With countless approaches available, navigating the world of investing can feel overwhelming.But one method that stands out is buying shares of dividend-paying companies, which -- over lengthy periods -- have consistently outperformed peers that don't pay dividends.A study by Hartford Funds showed that, over a 50-y ...