hello,

I am struggling a lot with how to program my dummy. I want to generate a dummy that equals 1 if the firm was an SME at the end of 2012, and 0 if the firm was not. In order to be an SME, a firm has to be between certain boundaries for a couple of years before. Therefore, I already programmed whether or not the firm was within these boundaries from 2010 to 2012, I named these SME2010 SME2011 SME2012. The firm will have the status 'SME' at the end of 2012 if the firm has exceeded these limits for no more than one of these three years. I, however, have no idea how to program this correctly. Could you please help me?

thanks a lot!
Timea De Wispelaere