The Mid-Life Crisis

It explores the claim that the mean level of life satisfaction and contentment may follow a convex quadratic equation over the bulk of the lifespan. [...] One way to think about the rationale for the Yang intrinsic estimator (IE), therefore, is that it removes the influence of the design matrix on the coefficient estimates. [...] We also included “imputed sleep’’, defined as short gaps in the early hours at the beginning or end of the diary, where the diarist is at home or in the same location where they report sleeping on the diary day, and asleep before the gap at the end of the diary, or they were asleep following the gap at the beginning of the diary. [...] The latest survey is the fourth in the series and was conducted by NatCen Social Research, in collaboration with the University of Leicester, for National Health Service (NHS) Digital. [...] The underlying equations, which are reported later in the supplementary Appendix, control for gender, educational level, marital status, the number of children, the type of housing in which the respondent lives, and employment status.