id	keyword
american_scientific_journal-7034	energy
american_scientific_journal-7034	poverty
american_scientific_journal-7034	vol
american_scientific_journal-7034	energy poverty
american_scientific_journal-7034	variables
american_scientific_journal-7034	growth
american_scientific_journal-7034	countries
american_scientific_journal-7034	panel
american_scientific_journal-7034	industrialization
american_scientific_journal-7034	data
american_scientific_journal-7034	urbanization
american_scientific_journal-7034	employment