Why are foreign firms listed in the U.S. worth more?

Why are foreign firms listed in the U.S. worth more?

Bibliographic Details
Main Author: Doidge, Craig
Other Authors: Karolyi, G. Andrew, Stulz, Rene M.
Format: Book
Language:English
Published: Cambridge National Bureau of Economic Research 2001
Series:NBER working paper series no.8538
Subjects:
Portfolio management.
Stock exchange.
Investments.
Investments, Foreign > United States.
Corporations, Foreign > United States.