(un)fit for work u-index u-shaped ugly ultimate value unambiguous unaware uncertainties uncertainty unconsidered under class underdeveloped under educated Underemployed under employment understandable understanding underweight undocumented unease Unemployed Unemployment in vicinity Unemployment of parent Unemployment of spouse Unemployment rate in nation Unemployment rate in region unequal unequal life chances Unexplained component in prices unfit for work unhoused uni-dimension affect unification uniform uniformity unimpaired unintended consequences unintended purchase Union member unique unisex unisexual university unlabeled unmarried unmarried living together unobtrusive unoriginal unpaid work unplanned child Unrest in nation unsafe unsatisfied unstable unsteady unusual unvoluntary voluntary work unwanted unwanted pregnancy upbringing Uplifts upper uprising ups downs uptown upward urban Urban/rural Urban green urban growth/shrink Urbanity Urbanization in nation Urban planning urban sprawl urge use Use for inferring preferences usefulness Use in health care Use in Human Resource Management (HR) Use in marketing Use of alternative medicine Use of anti-depressives in nation Use of happiness training Use of health services Use of pornography Use of strengths Use of the word happiness Use of vaccination use of word users Uses of happiness concepts Uses of happiness measures U shaped Utilitarianism utility utility calculation Utility of happiness utopian utopic