@article {33375,
	title = {Industry Rents: Evidence and Implications},
	journal = {Brookings Papers on Economic Activity: Microeconomics},
	year = {1989},
	pages = {209-90},
	url = {https://www.brookings.edu/wp-content/uploads/1989/01/1989_bpeamicro_katz.pdf},
	author = {Lawrence F. Katz and Lawrence H. Summers}
}
