Patents
Subtitle: recent trends and puzzles
By: Zvi Griliches.
Series: NBER working paper series -- working paper no. 2922; Working paper series (National Bureau of Economic Research) -- working paper no. 2922.
Publisher: National Bureau of Economic Research
Published: 1989
Place of publication: Cambridge, MA
Language: eng
Number of pages: 38
Subjects: Patents -- Economic aspects -- United States.; Patents -- United States.; Industrial productivity -- United States.; Research, Industrial -- Economic aspects -- United States.
Notes: "April 1989."

Includes bibliographical references (p. 31-38).

Binghamton University Libraries' copy bound with: Pensions as retirement income insurance.