  In the past years we have witnessed the rise of new data sources for the
potential production of official statistics, which, by and large, can be
classified as survey, administrative, and digital data. Apart from the
differences in their generation and collection, we claim that their lack of
statistical metadata, their economic value, and their lack of ownership by data
holders pose several entangled challenges lurking the incorporation of new data
into the routinely production of official statistics. We argue that every
challenge must be duly overcome in the international community to bring new
statistical products based on these sources. These challenges can be naturally
classified into different entangled issues regarding access to data,
statistical methodology, quality, information technologies, and management. We
identify the most relevant to be necessarily tackled before new data sources
can be definitively considered fully incorporated into the production of
official statistics.
