But, as Professor Richard Layard of the London School of Economics has argued in his recent book Happiness: Lessons from a New Science , promoting friendship is often easy, cheap, and can have big payoffs in making people happier.
Pero, como el profesor Richard Layard de la London School of Economics argumenta en su libro más reciente Happiness: Lessons from a New Science, a menudo promover la amistad es fácil y barato, y hacer más feliz a la gente puede tener grandes dividendos.