mickthesick , I do not know why you wanted to work for the test-statistics so much. Don't care too much about the test-statistics as long as you have sufficient reason to believe some variables are important from theoretical aspect. Basically, you have to include all the variables which you think are important. There is this tendency of emerging economists to focus on making the t-statistics significant, getting a high-R -square value and so forth. What I would suggest is that include all the variables which you think are important. You are here to see what data tells, not manipulate the data to get desired results. I think you need to add some more variables. And as for not finding the inflation rates, I think you can find most of the data from World Bank. So, consult World Bank Statistics... This is the reason, I never come to any conclusion by reading just one study. One can always manipulate the variables and data until the desired results are achieved. However, if from time and again, many studies come to the same conclusion, we have some information about the reality. I think finding the data about Indian GDP should pose no problem at all...there have been a lot of studies done on India. I'd suggest that you consult with your professor and get his feedback.