id	keyword
economy-971	cluster
economy-971	firms
economy-971	development
economy-971	industrial
economy-971	nnewi
economy-971	nigeria
economy-971	study
economy-971	economic
economy-971	parts
economy-971	cluster development
economy-971	motorcycle
economy-971	economy
economy-971	sales
economy-971	capital
economy-971	profit
economy-971	dummy
economy-971	state
economy-971	growth
economy-971	parts cluster