Moore, Frances C.
Diaz, Delavane B.
Article History
Received: 24 June 2014
Accepted: 25 November 2014
First Online: 12 January 2015
Change Date: 28 January 2015
Change Type: Erratum
Change Details: In the version of this Letter originally published, in equation (1) and in the explanatory sentence following the equation, jTFP should have read rTFP. In the second line of the equation, jDJOj,t should have read rDJOj,t. These errors have been corrected in the online versions of the Letter.
Competing interests
: The authors declare no competing financial interests.