st: Mkspline, age classes and probit

["Elena Giarda" <elena.giarda@prometeia.it>]

Dear all,

I'm fitting a probit/logit model on Italian labour force micro data where 
the dependent variable is "female labour market participation" and among the 
explicative variables I have age, education level, dummy variables for the 
presence of children of various ages, partner's education level and a dummy 
for an unemployed partner.

My original idea was to estimate the relevance of cohort effects, but after 
2004 (my data date back to 1993) the variable age has not been made 
available anymore, if not grouped in 5-year age classes, making it 
impossible to create birth cohorts. In order to study the effects of age on 
female participation I thought of using age splines, but I'm not sure it 
makes sense to build them with age classes. If this is reasonable, would the 
interpretation of the estimated coefficients be the standard one of the 
probit/logit specification?

Many thanks!
Elena


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