Another thesis is that the country actually has a thriving market economy. The old communist distribution network collapsed during the famine of the 90's and was never rebuilt. It was replaced instead by a market that started out just providing the basics but which has grown into a sophisticated system where people with money can obtain almost anything, from American pharmaceuticals to Japanese electronics and clothing from throughout the world. Worth a read. The question is how much longer will these people put up with their evil rulers.
Yet, isn’t banking, industry, etc, still nationalized? Isn’t agriculture still collectivized?