“... for the development of any country, it is a private good, because it is not a standard training process, analogous...”
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“... cause industrial conjuncture in Colombia. Private surveys and official data are used. Results...”
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“... to private schools and with a unique gender, the use of textbook and the school size....”
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“... for the development of any country, it is still a private good, given that it is not a standard training process...”
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