TY  - BOOK
AU  - Wagner,Karin
AU  - Ark,Bart van
TI  - International productivity differences: measurement and explanations 
T2  - Contributions to economic analysis
SN  - 0444824170
PY  - 1996///
CY  - Amsterdam
PB  - Elsevier
KW  - Industrial productivity
KW  - Congresses
N1  - Includes bibliographical references and index
ER  -