Table A1.

Linear and Quadratic Age Effects on the Within-person Change in Life Satisfaction Between Year t and t − 1

	BHPS		HILDA		SOEP		MABEL
	Coefficient	p value	Coefficient	p value	Coefficient	p value	Coefficient	p value
Panel (a): time trend, without controls
Age	0.001	0.000	0.001	0.000	0.001	0.001	0.001	0.077
N	103,159		80,538		185,243		13,910
Panel (b): time trend, socio-economic controls†
Age	0.001	0.000	0.002	0.000	0.003	0.000	0.002	0.103
Length of time spent in the panel	0.007	0.017	0.036	0.000	0.021	0.000	0.102	0.119
Length of time spent in the panel2	−0.0002	0.095	−0.002	0.006	−0.001	0.000	–*	–*
N	98,320		80,389		185,169		9,297
Panel (c): time trend, socio-economic controls† with age-squared
Age	0.003	0.059	0.017	0.000	0.006	0.000	0.014	0.138
Age-squared	−0.00002	0.263	−0.0002	0.000	−0.00004	0.010	−0.0001	0.196
Length of time spent in the panel	0.066	0.024	0.028	0.001	0.020	0.000	0.099	0.130
Length of time spent in the panel2	−0.0002	0.115	−0.002	0.013	−0.001	0.000	–*	–*
N	98,320		80,389		185,169		9,297

Notes. Dependent variable: delta life-satisfaction. Ordinary least squares equations with robust standard errors and clustering at the individual level.

^*The squared term for the panel condition variable is omitted because this variable is approximately collinear with the level variable due the short nature of the MABEL panel.

^†Socio-economic controls are described in the Section 2.