Speaking of Podcasts, which I am a bit addicted to, in addition to the Africa Today Podcast from the BBC, which comes out 5 days a week, I also subscribe to NPR's Planet Money podcast, which features short, digestive summaries of complex economic stories in the news.
Earlier this year, Planet Money has two episodes about Nigeria and Ghana's GDP calculations. One called, When a Poor Country Gets a Whole Lot Richer, which described the re-adjustment of Nigeria's GDP calculations, moving the baseline year up and accounting for whole sectors such as mobile telephony, resulting in a radically larger GDP figure. Earlier in the year, an episode covered both Ghana's 2010 GDP readjustment as well as emerging tech sectors contributing to Nigeria's GDP reckoning.
I definitely recommend listening to the whole episode via the link above, which is quite illustrative on how GDPs are calculated and informative generally on Nigeria's economic growth, but I also was amazed to hear the episode because I had written an email to Planet Money and recommended this topic for a show. Unfortunately, no love for me in the credits, but still.