I am currently doing a thesis & struggling with my regression model. I am examining the link between profit levels debt levels in the oil and gas industry. My Dependent variable is Profitability, Independent variables are Debt/Size of company/Growth rate of sales & a dummy variable for Company Type.

My data has 66 companies, spanning 11 years.

I have run individual cross-section regressions across each of the 11 years. However, to test certain hypotheses do I need an 'overall' cross-section which includes all 11 years worth of data? I do not have the software to run panel data analysis (SPSS). Is this even possible? (taking into account the time-series aspect)

Obviously I do not intend to run 11x4 sets of hypotheses tests! All help is greatly appreciated.