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, j TFP should have read r TFP . In the second line of the equation, j DJO j , t should have read r DJO j , t . These errors have been corrected in the online versions of the Letter.
Competing interests
: The authors declare no competing financial interests.