I want to examine the effect of several xvar (gender, age, education) on the evaluation on partyleader, and if this effect changes depending on the leaders gender, age and education.

I have a dataset consisting of several choice studies (in the years 1994, 1998, 2001, 2005, 2007 and 2011) all using the same variable in measuring both xvar and yvar.

I would like to somehow cluster my data, so I will be able to se the effect over time, and if this effect is changing over time. So fx. the effect when there is a male respondent and a male party leader, and if this effect is larger or smaller in 1994 compared to 2011. Also fx. if the effect is larger if the respondent is female and the leader is female compared to if the respondent is male and the leader is male.


My main question is how I will be able to cluster og make this OLS reg between my xvar (gender, age and education) and my yvar (leader evaluation) across time and vary in different kinds of characteristics of the respondent and the leader.