The article reveals the effect of ‘bad regulations’ on investment in Indonesia, highlighting the negative effect following the introduction of local tax law in 2009 @FrontPolSci
@arpitrage FWIW, here is the Matlab code I wrote in 2006 to do this (the "backbon" on the exact image of the product space in your tweet). It is not very elegant, but it got the job done (with a greedy algorithm).