Growth stocks have powered past dividend stocks over the last year, but long-term investors can find undervalued dividend payers among those left behind, including stocks that have been raising payouts, Morningstar's chief markets editor, Tom Lauricella, wrote in a blog post this week.Lauricella noted that investors can look for either stocks that offer the highest yields, names with a history of stable dividend payouts and robust finances or companies that are raising dividends.Morningstar analysts took the latter course, screening stocks that have increased their quarterly dividends. This can be a sign of a company's confidence in its future finances, he said.To come up with a list of stocks for investors to consider, Morningstar analysts started with the full list of U.S.-based companies they cover and looked for names that pay investors a quarterly dividend. They then tracked changes from previous payouts in dividends announced in February. From there, they filtered for companies whose dividend increased by 5% or more to capture the most substantial changes. They excluded stocks with dividend yields of less than 2%. After that, they picked companies they considered undervalued, meaning they are rated 4 or 5 stars.See the gallery for 13 undervalued, dividend-paying stocks that passed Morningstar analysts' screen. Year-to-date performance is as of March 6.