The answer might be somewhere else, and if it is I'm sorry for opening a new topic, but I could not find it so far...
For my graduating thesis I have to work with SPSS for the first time and I have a (probably very simple) question. I have to perform a multiple regression analysis to determine the influence of several independent variables on one dependent variable. I have to perform this analysis using data from 7 years. So I have a sample of 100 firms with balance sheet data of 7 years. How do I construct my data file?
Do I have to make a separate variable for each of the 7 years (e.g. size_2001, size_2002, size_2003 etc) which still leaves me with a sample of 100 firms, but 7 times the number of variables? Do I enter each firm 7 times (e.g. Shell_2001, Shell_2002, Shell_2003) so that I have a sample of 700, but the original amount of variables?
Or is there an entirely different method of doing this?
Thanks already for the help, really appreciate it!