Why doesn't NYC have a lot of manufacturing plants?

My topic is on, Why doesn't NYC have a lot of manufacturing plants? Basically it comes down to outsourcing. The main reason why so many manufacturing plants left not just NYC but the United states is because of high taxes being imposed to all manufacturing plants, so these companies decided to send their manufacturing side of their companies over seas to avoid the high taxes. I have three sources for my research paper so far. One is Mary A. Marchant and Sanjeev Kumar. Dr. Marchant is a Professor, Department of Agricultural and Applied Economics, at Virginia Tech  and Sanjeev Kumar  was a noted Indian film actor. One of Dr. Marchant's and Sanjeev Kumar articles gives a great light on the general basics of outsourcing, especially since Dr. Marchant has been studying outsourcing for years. 

  Second source is, Dr. K. Morris Speter has significant (25 years) corporate and academic (13 years) experience. He  taught Marketing and International Business at Mercy College and has been doing research about economic development in Africa and China and the impact of Globalization. He has published more than 60 papers and presented many of them at various academic conferences. His work basically proofs he's a credible source. He really sheds light about the impact of Globalization which helps certain points I'm making in my research paper. 

My third source is a data scientist in Denmark and the author of  "Productivity Impacts of Offshoring and Outsourcing"  Karsten Bjerring Olsen is a definitely credible source and uses research data to proof the impacts of offshoring, which help my case in my research paper. 

Work Cited

Karsten Bjerring Olsen, Productivity Impacts of Offshoring and Outsourcing: A Review. STI Working Paper 2006/1

Mary A. Marchant and Sanjeev Kumar. An Overview of U.S. Foreign Direct Investment and Outsourcing. Review of Agricultural Economics 379–386. 2005

Morris, Speter. Globalization, Free Trade, and Outsourcing A College Student's Perspective; Northeast Business & Economics Association 35th Annual Conference. 2008