I am going to be starting a PhD program in an economicsrelated field and will be doing econometric type statistical work. I have experience using a few differentstatistical packages but want to try to focus my knowledge on one program formy future studies and research. In myexperience, the largest challenges with statistical packages are first availabilityfor my own laptop (since they are expensive) and compatibility with various operatingsystems. So I am thinking that the bestchoice of program is R. R seems to beflexible enough to do most data manipulations/cleaning and I know that with theR packages there are lots of developed procedures to do complex analysis. However, I expect there are other factors Iam not considering and would appreciate any insight into choosing a statisticalpackage to focus my skills in. Perhapsthis is not even something worthwhile to do. Please let me know thoughts andcomments. Thanks!!!!!