Before revision:  Due to the difficulty in modeling and quantifying capabilities , research efforts have so far concentrated on the exported products as a main proxy to infer the complexity of the productive system. To bridge this gap, we propose a novel probabilistic framework which leverages Bayesian non-parametric techniques to extract the dominant features behind the comparative advantage in exported products.
After revision:  In general, measuring the capabilities behind economic complexity directly is difficult, and indirect measures have been suggested which exploit the fact that the presence of the capabilities is expressed in a country's mix of products. We complement these studies by introducing a probabilistic framework which leverages Bayesian non-parametric techniques to extract the dominant features behind the comparative advantage in exported products.