It seems that happiness is busting out all over – like that famous lyric from the classic Broadway musical, Oklahoma. True, happiness is not much in evidence in our economy, or in our shrill and rancorous politics. But never mind. An explosion of research and a bumper crop of writings about happiness can be found -- somewhat incongruously -- in various academic journals these days, as well as in the bookstalls. A dozen titles were counted in a local bookstore recently without breaking a sweat.