Zeros, quality and space : trade theory and trade evidence /
Baldwin, Richard E.
Harrigan, James.
Centre for Economic Policy Research (Great Britain)
London : Centre for Economic Policy Research,
2007.
"July 2007".
"International trade".
Includes bibliographical references (p. 26-27).
International trade
Exports
Also available from the CEPR World Wide Web site (www.cepr.org).