Hello to anyone! I've decided to buy a new laptop and my final choice was a macbook pro with retina display. I've just started my PhD in economics and my major fields will be empirical economics and econometrics. I will use programs like Stata, Matlab and other statistical softwares for econometric analysis, therefore often using large datasets. In general I strictly prefer the portability (... and price) of the 13 inch and I was considering the i7 processor configuration to have a more powerful CPU; however I'm also taking into account that it should come out to be more useful the more powerful quad-core processor and the 16gb of RAM of the 15". The question is the following: is it actually useful to spend more money and renounce to some portability, given my use of this laptop? The 15 inch is of course more powerful in general, but given what I will do in my next future do I actually use this extra performance or it can be more than sufficient the 13 inch with the i7 processor? I'm going creasy Hope someone with stronger experience than me could help me to do the best choice! Thank you very much!