All
I have survey data for one year from which I want to estimate an equation for the age a person had his first child. I derive the independent variable from the adult's and oldest child's age. When I regress that equation I have significantly positive cohort effects for old cohorts which I find quite puzzling for my UK sample. My expectation was that the age someone had a child would increase over time. Do you have any views on what might have gone wrong.
Dirk NachbarAssistant Economist
Pensim2
Department for Work and Pensions
Level 4, The Adelphi
1-11 John Adam St
WC2N 6HT London
020 796 28531
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