A new study suggests that, contrary to what we've always been told, money - can - buy you happiness. Researchers Daniel Kahneman and Matthew Killingsworth make the case that happiness steadily increases as incomes rise, and increases even faster as pay rises above 100-thousand dollars a year. But they say for that to happen, a person has to have a certain baseline level of happiness. The study is published in the latest edition of Proceedings of the National Academy of Sciences.